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DECAMETHYL

Decamethyl is a volatile, colorless, and odorless liquid used in a variety of personal care products, including skin creams, cosmetics, shampoos, deodorants, and conditioners.
Decamethyl acts as a carrier ingredient, allowing products to spread smoothly, providing a silky, luxurious feel, and evaporating quickly for a non-greasy finish.
Decamethyl has been subject to regulatory scrutiny due to concerns about its potential environmental impact and health effects, leading to restrictions in some product categories.

CAS Number: 541-02-6
EC Number: 208-764-9
Molecular Formula: C10H30O5Si5
Molar Mass: 370.77 g/mol

Synonyms: Cyclopentamethicone, Cyclic dimethylsiloxane pentamer, D5, D5, 2,2,4,4,6,6,8,8,10,10-Decamethylcyclopentasiloxane, DECAMETHYLCYCLOPENTASILOXANE, 541-02-6, Cyclopentasiloxane, decamethyl-, Cyclomethicone 5, 2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane, Dimethylsiloxane pentamer, Dekamethylcyklopentasiloxan, CYCLOMETHICONE, UNII-0THT5PCI0R, 0THT5PCI0R, Ddecamethylcyclopentasiloxane, Dow corning 345 fluid, Dow corning 345, NUC silicone VS 7158, Silicon SF 1202, Cyclopentasiloxane, 2,2,4,4,6,6,8,8,10,10-decamethyl-, Cyclic dimethylsiloxane pentamer, MFCD00046966, Union carbide 7158 silicone fluid, KF 995, VS 7158, D5-sil, CCRIS 1328, HSDB 5683, Dekamethylcyklopentasiloxan [Czech], EINECS 208-764-9, decamethyl cyclopentasiloxane, SF 1202, BRN 1800166, Ciclopentasiloxane, Cyclomethicone D5, D5 Cyclomethicone, dimethylcyclopentasiloxane, Decamethylcylopentasiloxane, DSSTox_CID_7184, EC 208-764-9, DSSTox_RID_78338, DSSTox_GSID_27184, SCHEMBL28497, N-Propylheptamethyltrisiloxane, 4-04-00-04128 (Beilstein Handbook Reference), CHEMBL1885178, DTXSID1027184, CHEBI:191092, Decamethylcyclopentasiloxane, 97%, BCP15826, Tox21_303170, CD3770, AKOS008901199, ZINC169743678, CS-W009767, DB11244, 2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane, NCGC00163981-01, NCGC00257224-01, AS-59731, CAS-541-02-6, D1890, D3770, Decamethylcyclopentasiloxane (cyclic monomer), FT-0665531, D78203, S05475, Decamethylcyclopentasiloxane, analytical standard, Q414350, decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane, UNII-NMQ347994Z component XMSXQFUHVRWGNA-UHFFFAOYSA-N, Cyclomethicone 5, United States Pharmacopeia (USP) Reference Standard, 2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane #, D5 Cyclomethicone, Pharmaceutical Secondary Standard; Certified Reference Material, 0THT5PCI0R, 2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane, 2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecan [German] [ACD/IUPAC Name], 2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane [ACD/IUPAC Name], 2,2,4,4,6,6,8,8,10,10-Décaméthyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilécane [French] [ACD/IUPAC Name], 208-764-9 [EINECS], 541-02-6 [RN], Cyclic dimethylsiloxane pentamer, cyclomethicone 5, Cyclopentasiloxane, 2,2,4,4,6,6,8,8,10,10-decamethyl- [ACD/Index Name], D5 Cyclomethicone, decamethyl cyclopentasiloxane, Decamethylcyclopentasiloxane [Wiki], Decamethyl-cyclopentasiloxane, Dekamethylcyklopentasiloxan [Czech], GY5945200, MFCD00046966 [MDL number], 1,3,5,7,9,2λ2,4λ2,6λ2,8λ2,10λ2-pentaoxapentasilecane, 2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane; D5, 4-04-00-04128 [Beilstein], 4-04-00-04128 (Beilstein Handbook Reference) [Beilstein], CYCLOMETHICONE, Cyclopentasiloxane [ACD/Index Name], cyclopentasiloxane, decamethyl-, D5, Ddecamethylcyclopentasiloxane, decamethy lcyclopentasiloxane, decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane, decamethylcyclopentasiloxane, ???, Dekamethylcyklopentasiloxan [Czech], Dimethylsiloxane pentamer, Dow corning 345 [Trade name], Dow corning 345 fluid [Trade name], EINECS 208-764-9, NCGC00163981-01, NUC silicone VS 7158 [Trade name], Silicon SF 1202 [Trade name], UNII:0THT5PCI0R, UNII-0THT5PCI0R, Union carbide 7158 silicone fluid [Trade name]
Decamethyl leaves skin feeling soft, silky, without leaving any oily residue or build-up.
Decamethyl is oil-free, removes stickiness and spreads evenly.

Decamethyl is one of the most abundant compounds measured in urban indoor and outdoor air.
Decamethyl is used in many personal care products.

Additionally, particulate matter from urban areas is richer in silicon than less populated areas.
The vast majority of Decamethyl escapes into the atmosphere and the main loss source of Decamethyl is the hydroxyl radical.

Experimentally and computationally simulated environmental data from the room.
Decamethyl and OH experiments provide insight into aerosol efficiency and chemistry.

Aerosol yields and composition are shown as a function of NOx concentration.
Decamethyl is derived from Silicon, Oxygen and alkane.

They are used because of their special chemical properties: they are odorless, colorless, oil-free, easy to apply and dries quickly.
This family covers multiple categories of substances: Cyclotetrasiloxanes (D4), Cyclopentasiloxanes (D5), and Cyclohexasiloxanes (D6).

The term "silicone" may also be used to refer to siloxanes.
Decamethyl is an organosilicon compound with the formula [(CH3)2SiO]5.

Decamethyl is a slightly volatile, colorless and odorless liquid.
Decamethyl is classified as a cyclomethicone.

Decamethyl are cyclic in structure with an interconnected monomer backbone of one silicon and two oxygen atoms.
Decamethyl is used as a skin emollient in cosmetics and personal products.

Decamethyl, also known as cyclopentasiloxane, decamethyl, is an industrial chemical.
Decamethyl is a volatile polydimethyl cyclosiloxane mainly composed of decamethyl cyclopentasiloxane.

Decamethyl is clear, odorless, basically odorless, oil-free.
Decamethyl is an organosilicon compound with the formula [(CH3)2SiO]5.

Decamethyl is a slightly volatile, colorless and odorless liquid.
Decamethyl is classified as a cyclomethicone.

In personal care products, Decamethyl acts as a "carrier", allowing the products to spread smoothly and easily, Provides a silky, luxurious feel during application.
In dry cleaning, Decamethyl transfers detergent to clothes and rinses away accumulated dirt and oil.

Decamethyl is also among the most studied materials for consumer and industrial use.
Decamethyl is known to evaporate and dry quickly.

Decamethyls are also known to repel water and slide easily.
Decamethyl is a clear, colorless liquid with a relatively low boiling point and high vapor pressure. 

This makes Decamethyl volatile at room temperature, causing it to evaporate readily into the air. 
Decamethyls volatility contributes to its use as a carrier for other ingredients in personal care and cosmetic formulations.

Decamethyl and octamethylcyclotetrasiloxane (D4) are part of a larger class of compounds known as siloxanes. 
Decamethyl are characterized by their alternating silicon and oxygen atoms, often bonded to organic groups like methyl (CH3) groups. 

Decamethyl have a wide range of applications due to their unique properties, including thermal stability, electrical insulating properties, and compatibility with various materials.
Decamethyl is commonly used in cosmetic and personal care products for its beneficial properties.

Decamethyl imparts a smooth and soft feel to the skin and hair.
Decamethyl helps products spread easily and evenly.

Decamethyl ability to evaporate quickly gives a non-greasy finish to products.
Decamethyl serves as a carrier for other ingredients in formulations.

Decamethyl has been subject to regulatory scrutiny due to concerns about its potential environmental impact and health effects. 
Regulatory agencies in various regions have evaluated Decamethyl's safety, and restrictions or limitations on its use in certain product categories, especially in personal care products, have been implemented in some cases.

Decamethyls are also known to form a protective barrier on the skin and hair.
This can help detangle your hair, prevent breakage, and reduce frizz.

Decamethyl sometimes appears on the label as D5.
Decamethyl can also be placed under the broader category name of cyclomethicone.

Decamethyl is different from another siloxane known as dimethicone or polydimethylsiloxane (PDMS).
Decamethyl is a general term describing a single individual and/or a mixture of cyclic siloxane materials.

Decamethyl has many uses and is found in a variety of consumer products.
These materials are obtained from the natural elements silicon and oxygen.

Decamethyl creates many of the positive qualities we associate with personal care products: lush texture, silky smoothness, shine and is used in smooth applications.
Decamethyl helps personal care products to be non-flammable and non-irritating.

Decamethyl, for example, reduce the white residue and sticky feeling of antiperspirants and help "long-lasting" makeup maintain its strength.
Shampoos and conditioners with Decamethyl have better shine.
Decamethyl provides wetting and spreading properties.

Decamethyl any of various compounds containing alternating silicon and oxygen atoms.
Decamethyl is usually a linear or cyclic arrangement in which one or two organic groups are attached to each silicon atom.

Decamethyl is a volatile cyclosiloxane that is an essential ingredient for a wide variety of cosmetics and body care.
Decamethyl is well compatible with most solvents.

Decamethyl, a synthetic substance, consists of silicon and oxygen.
Sometimes elements such as hydrogen and carbon are also used.

Decamethyl is an organosilicon compound with the formula [(CH3)2SiO]5. 
Decamethyl is a colorless and odorless liquid that is slightly volatile.

Decamethyl is a fluid exhibiting low surface tension. 
Decamethyl has lubricating properties combined with volatility characteristics. 
Decamethyl imparts soft silky feel to the skin leaving no oil residue or build up. 

Decamethyl is non-greasy, detackifying and spreads evenly. 
Decamethyl is widely used in applications such as antiperspirants, deodorants, hair sprays, cleansing-, skin creams, lotions, bath oils, sun-tanning and shaving products, make-up and nail polishes. 
Decamethyl has a shelf life of 24 months.

Decamethyl is used in personal care products including skin creams, cosmetics, shampoos, deodorants and conditioners. 
Decamethyl is also used in various applications such as industrial cleaning fluids and dry cleaning solvents.

Decamethyl is an organosilicon compound with the formula [(CH3)2SiO]5. 
Decamethyl is a colorless and odorless liquid that is slightly volatile. 
Decamethyl is classified as a cyclomethicone.

Decamethyl is commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. 
Decamethyl is widely used in cosmetic products due to its unique functions as antistatic, emollient, humectant, solvent, viscosity controlling and hair conditioning agent.

Decamethyl is a cyclic siloxane, that has a silicon-oxygen bond in a cyclic arrangement and methyl groups attached with the silicon atom. 
Decamethyl is used in the production of some silicon-based polymers that are widely used in various personal care products.
Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.

Decamethyl is a silicone fluid commonly used in cosmetics such as deodorants, sunblocks, hair sprays and skin care products to lubricate, waterproof and provide shine. 
Like all other silicones, Decamethyl has a unique fluidity that makes it easily spreadable. 

When applied to the skin and hair, Decamethyl gives a silky and soft feeling to the touch and acts as a mild water repellent by forming a protective barrier on the skin. 
Decamethyl is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage.

Decamethyl is used in personal care products including skin creams, cosmetics, shampoos, deodorants and conditioners. 
Decamethyl is also used in various applications such as industrial cleaning fluids and dry cleaning solvents.

Decamethyl is a precursor in the production of siloxane polymers for industry and medicine and is a carrier ingredient in many toiletries and cosmetics. 
Decamethyl has a relatively low order of toxicity following acute administration via the oral, dermal, and inhalation routes of exposure. 
Decamethyl is not considered to be a dermal or eye irritant or a dermal sensitizer. 

There is no appreciable dermal absorption of Decamethyl based on results from in vivo and in vitro studies. 
Decamethyl has not been shown to be genotoxic/mutagenic when tested in a number of short-term in vitro and in vivo assays and did not cause reproductive or developmental toxicity in rats. 

Inhalation exposure of rats to 160 ppm Decamethyl for up to 24 months produced adverse effects in the liver (weight changes and hepatocellular hypertrophy) and uterus (increased incidence of endometrial adenocarcinoma, endometrial adenoma, and adenomatous polyps in several animals); however, the results of recent mode-of-action studies are consistent with a uterine tumorigenesis mechanism that is not relevant for humans. 
Based on the results of the chronic inhalation study, 160 ppm was determined to be the no-observed-adverse-effect level (NOAEL) and was selected as the point of departure for the derivation of the workplace environmental exposure level (WEEL) value. 

This NOAEL was adjusted to account for interindividual variability and residual uncertainty regarding upper respiratory tract changes still occurring at 160 ppm. 
The resulting 8-h time-weighted average WEEL value of 10 ppm is expected to provide a significant margin of safety against any potential adverse health effects in workers exposed to airborne Decamethyl.

Decamethyl is a cyclic siloxane used in the formulation of consumer products as well as an industrial intermediate. 
A summary of the previous studies on the toxicology of Decamethyl is provided. 

Toxicokinetic studies with Decamethyl after dermal administration demonstrate a very low uptake of due to rapid evaporation. 
Following inhalation exposure, exhalation of unchanged Decamethyl and excretion of metabolites with urine are major pathways for clearance in mammals. 
Due to this rapid clearance by exhalation, the potential for bioaccumulation of Decamethyl is considered unlikely. 

The available toxicity data on Decamethyl adequately cover the relevant endpoints regarding potential human health hazards. 
Decamethyl was not DNA reactive or mutagenic in standard in vitro and in vivo test systems. 

Decamethyl also did not induce developmental and reproductive toxicity in appropriately performed studies. 
In repeated studies in rats with subacute, subchronic and chronic inhalation exposure, mild effects on the respiratory tract typically seen after inhalation of irritating materials, increases in liver weight (28- and 90-day inhalation studies), and a small increase in the incidence of uterine adenocarcinoma (uterine tumor) in female rats (two-year inhalation chronic bioassay) were observed. 

The liver effects induced by Decamethyl were consistent with D5 as a weak “phenobarbital-like” inducer of xenobiotic metabolizing enzymes and these effects are considered to be an adaptive response. 
Mechanistic studies to elucidate the mode-of-action for uterine tumor induction suggest an interaction of Decamethyl with dopamine signal transduction pathways altering the pituitary control of the estrus cycle. 

The resulting estrogen imbalance may cause the small increase in uterine tumor incidence at the highest Decamethyl-exposure concentration over that seen in control rats. 
A genotoxic mechanism or a direct endocrine activity of Decamethyl is not supported as a mode-of-action to account for the induction of uterine tumors by the available data.

Uses of Decamethyl:
Decamethyl is a cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products. 
Decamethyl is used in dermal exposure and inhalation toxicity study.

Decamethyl is used intermediate in the manufacture of high mol wt siloxane polymers. 
Decamethyl is a carrier ingredient in personal care products; dry cleaning solvent.

Decamethyl is incorporated into a formulation for its emollient and solvent activity.
Octamethylcyclotetrasiloxane and Decamethyl are major industrial products, which are either marketed as such or used for the production of polydimethylsiloxanes.

Decamethyl is classified as a cyclomethicone. 
Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. 

Decamethyl is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. 
Decamethyl is also used as part of silicone-based personal lubricants. 

Decamethyl is considered an emollient. 
In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.

10,000–100,000 tonnes per year of Decamethyl is manufactured and/or imported in the European Economic Area.
Atmospheric emissions of Decamethyl in the Northern Hemisphere were estimated to 30,000 tonnes per year.

Decamethyl used in dermal exposure and inhalation toxicity study.
Decamethyl is classified as a cyclomethicone. 

Decamethyl is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. 
Decamethyl is also used as part of silicone-based personal lubricants. 
Decamethyl is considered an emollient. 

In Canada, among the volume used in Decamethyl approximately 70% were for antiperspirants and 20% for hair care products.
10,000–100,000 tonnes per year of Decamethyl is manufactured and/or imported in the European Economic Area.
Atmospheric emissions of Decamethyl in the Northern Hemisphere were estimated to 30,000 tonnes per year.

Decamethyl is used in personal care products including skin creams, cosmetics, shampoos, deodorants and conditioners.
Decamethyl is also used in various applications such as industrial cleaning fluids and dry cleaning solvents.

Decamethyl is used in conditioners, hair sprays, face wash, body wash, make-up, sun care.
Decamethyl is used in antiperspirants and deodorants.

Decamethyl is commonly used in cosmetics such as deodorants, sunscreens, hair sprays, and skin care products.
Decamethyl is becoming more common in conditioners, as Decamethyl does, hair becomes easier to comb without breaking.

Decamethyl is also used as part of silicone-based personal lubricants.
Decamethyl is considered an emollient.

Decamethyl can be used as: A greener solvent in synthetic chemistry applications.
Decamethyl is a silicone fluid widely used in cosmetics such as deodorants, sunscreens, hair sprays.

Like all other silicones, Decamethyl has a unique fluidity that spreads easily.
Decamethyl, when applied to the skin and hair, feels silky and soft to the touch and acts as a preservative.

Decamethyls are used in silicone fluids, elastomers and used in resins.
Decamethyl is widely used in cosmetic and body care products such as skin care, sunscreen, makeup, hair.

Decamethyl is directly used as carrier, is the main raw material, can also be used as additive; and being Used in aqueous systems by emulsification method.
Decamethyl is widely used in applications such as antiperspirants, deodorants, hair sprays, cleaning.

Decamethyl is widely used in applications such as antiperspirants, deodorants, hair sprays, cleaning.
Decamethyl is actually a type of silicone that is regularly used in skin care and hair care products.

Decamethyl is part of a particularly small group of silicon: cyclomethicones are also used.
According to clinical studies and reports, Decamethyl is considered safe for cosmetic ingredient uses.

Decamethyl is an odorless, colorless, non-oily liquid used in personal care products and as a dry ingredient.
Decamethyl is commonly used as an ingredient in lubricants and sealants.

Decamethyl is used in Adhesives and Sealants, Chemical Synthesis, Construction Chemicals, Glass and Ceramics, Industrial Chemicals, Silicones and Silanes, Coatings.
Decamethyl is used in Coatings, Adhesives, Sealants and Elastomers, Chemical and Materials Manufacturing, Construction and Building Materials, Surface Treatment - Fluids, Lubricants and Metalworking.

A base fluid with excellent spreading, easy rubbing and lubricating properties found in many personal care products has unique volatility properties.
Decamethyl is used in antiperspirants, deodorants, hair sprays, cleaning creams, skin creams, lotions and stick products, bath oils, sun and shaving products, make-up materials, nail polishes.
Decamethyl in rods has the right balance between volatility and diffusion.

Decamethyl is classified as a cyclomethicone.
Decamethyl is widely used in cosmetics such as deodorants, sunscreens, hair sprays, and skin care.

Decamethyl is becoming more common in conditioners, as Decamethyl does, hair becomes easier to comb without breaking.
Decamethyl is also used as part of silicone-based personal lubricants.

Decamethyl is considered an emollient.
Decamethyl is used as a skin emollient in cosmetics and personal products.

Decamethyl is used in cosmetics such as deodorants, sunscreens, hair sprays, and personal care.
In addition, Decamethyl is used in silicone-based personal lubricants.

Also, Decamethyl is a cyclic volatile methylsiloxane used in conditioners so it is also used in hair brushes.
Decamethyl is a cyclic volatile methylsiloxane (cVMS) used in cosmetics and personal care products.

Decamethyl is also used in a dermal exposure and inhalation toxicity study.
Decamethyl is used in personal care products including skin creams, cosmetics, shampoos.

Decamethyl is also used in a variety of applications such as industrial cleaning fluids and dry cleaning.
Decamethyl is used as an intermediate in the production of high molecular weight siloxane polymers.

Decamethyl is used as a carrier in personal care products.
Decamethyl is used as a dry cleaning solvent.
Decamethyl is included in a formulation for softener and solvent of Decamethyl.

Decamethyl and Decamethyl are the main marketed industrial products.
Decamethyl is used in the production of some silicone-based polymers that are widely used in various industries.

Pharmaceutical secondary standards for application in quality control provide pharmaceutical laboratories and manufacturers with a convenient and cost-effective alternative to establishing in-house working standards.
Decamethyl is widely used in cosmetics such as deodorants, sunscreens, hair sprays, and skin care.

Decamethyl is becoming more common in conditioners because D5 siloxane makes hair easier to comb through.
Decamethyl is also used as part of silicone-based personal lubricants.

Decamethyl is considered an emollient.
Decamethyl can be used as a carrier solvent in pharmaceutical formulations, assisting in the dispersion of active ingredients and enhancing drug delivery.

Decamethyl can be utilized in the production of polymer materials, including plastics, as a processing aid, lubricant, or release agent.
Decamethyl's lubricating properties make it suitable for use in industrial lubricants and machinery where its low viscosity and thermal stability are advantageous.

Decamethyl's used to modify the viscosity and improve the application properties of adhesives and sealants, contributing to their performance.
Decamethyl is used as a dielectric fluid in various electrical applications, such as cooling transformers and insulating components in the electronics industry.

Decamethyl can be found in lubricants and protective coatings used in the automotive and aerospace sectors.
Decamethyl can be added as an ingredient to silicone blends used in cosmetic applications.

Decamethyl is used in skin creams and sunscreens, where siloxane may be labeled "cyclomethicone" or "cyclopentasiloxane."
Decamethyl can also be used as a dry cleaning solvent in closed systems, which is considerably limited.

Decamethyl is used as an alternative to tetrachlorethylene in dry cleaning and industrial cleaning.
Decamethyl is a cyclic siloxane used in the formulation of consumer products and industrially.

Decamethyl is a precursor in the production of siloxane polymers for industry and medicine and is a carrier in many toiletries and cosmetics.
Decamethyl is found or used in the manufacture of a wide variety of products.

The predominant use of Decamethyl siloxane worldwide and in Canada is in the blending and formulation of consumer products.
Decamethyl is also used in the production of silicone polymers.
Decamethyl is used in hair/skin care products, antiperspirants and similar personal care products.

Decamethyl is used for excellent spreading, rapid evaporation leaving no residue or build-up, unique feeling of softness and lubricity.
Decamethyl is non greasy, non-occlusive and non-irritating.

Decamethyl is used in industrial processes (for example, as a surfactant in some pesticide products) and as a defoamer), lubricants, cleaning products, sealants, adhesives, waxes, lacquers and coatings.
Decamethyl is widely used as a volatile excipient in cosmetic products.

A growing number of commercial dry cleaners in Canada are using Decamethyl as their dry cleaning fluid.
Decamethyl is widely used in cosmetic products due to the unique functions of D5 siloxane as an antistatic.

Decamethyl is widely used in many cosmetic products for the following reasons: thanks to its low surface tension Decamethyl is also used to spread rapidly on the skin and hair.
Decamethyl has hydrophobicity, Decamethyl has volatility (Decamethyl evaporates from skin or hair within 4-12 hours after application), and Decamethyl has stability.

Decamethyl can have many different functions in cosmetic products.
Decamethyl is becoming more common in conditioners because it makes it easier to brush the hair.
Decamethyl is also used as part of silicone-based personal lubricants.

Cosmetic uses:
Decamethyl can be frustrating to decipher the long chemical names on the label of your favorite cosmetic products. 
Simple ingredients like water and alcohol are easy to recognize. 

But lengthy chemical names can leave even the most conscious consumers scratching their heads.
Decamethyl is used in hundreds of cosmetics. 

In the past, there was controversy about Decamethyl's potential health and environmental risks. 
But the Cosmetic Ingredient Review Expert Panel considers Decamethyl safe to use in cosmetics. 

However, in early 2018 the European Union introduced restrictions on Decamethyl use in cosmetic products that are intended to be washed off before evaporation. 
Concentrations above 0.1% in wash-off products were determined to have a risk of accumulating in the water supply.

Applications of Decamethyl:
Decamethyl-d30 is a deuterated version of Decamethyl (D212440). 
Decamethyl is a cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products. 
Decamethyl was also used in a dermal exposure and inhalation toxicity study.

Decamethyl can be used as:
A greener solvent in synthetic chemistry applications.
A monomeric unit for polymerization by various base catalysts to obtain polysiloxane polymer.

Other Applications:
Creams, lotions & gels
Decorative cosmetics/Make-up > Nail polishes
Hair care (Shampoos, Conditioners & Styling) > Styling/Hair sprays
Sun care (Sun protection, After-sun & Self-tanning) > Self tanning products
Toiletries (Shower & Bath, Oral care...) > Antiperspirants & deodorants
Toiletries (Shower & Bath, Oral care...) > Shaving

Features of Decamethyl:
Volatile carrier
Compatible with a wide range of cosmetic ingredients
Low surface tension
Imparts soft silky feel to the skin
Excellent spreading
Leaves no oily residue or build up
Detackification
Non-greasy

Production and polymerization of Decamethyl:
Commercially Decamethyl is produced from dimethyldichlorosilane. 
Hydrolysis of the dichloride produces a mixture of cyclic dimethylsiloxanes and polydimethylsiloxane. 

From this mixture, the cyclic siloxanes including Decamethyl can be removed by distillation. 
In the presence of a strong base such as KOH, the polymer/ring mixture is equilibrated, allowing complete conversion to the more volatile cyclic siloxanes: 
[(CH3)2SiO]5n → n [(CH3)2SiO]5

where n is a positive integer. 
D4 and Decamethyls are also precursors to the polymer. 
The catalyst is again KOH.

History of Decamethyl:
Decamethyl, a type of cyclic siloxane, has a history tied to the development of organosilicon chemistry in the 20th century.
Silicones, as a broader class, were first synthesized in the early 1900s, with significant contributions from British chemist Frederick Kipping, who studied organic silicon compounds.

However, Decamethyl wasn’t until the mid-20th century that cyclic siloxanes, including D5, were produced and became prominent in industrial applications.
D5, with Decamethyl's unique chemical structure, consisting of five silicon-oxygen units in a ring, was found to have exceptional stability and low surface tension, which made it highly desirable for various commercial uses.
By the 1980s and 1990s, Decamethyl became widely used in personal care products, including deodorants, hair sprays, and skin lotions, due to its volatility, smooth texture, and non-greasy feel.

Environmental and health concerns surrounding Decamethyl started to emerge in the early 2000s as researchers began investigating the compound's potential to persist in the environment and bioaccumulate in organisms.
Despite Decamethyl's widespread use, regulatory bodies in different parts of the world, such as the European Chemicals Agency (ECHA) and Environment Canada, began reviewing its safety.

Over the years, studies have led to varied conclusions, with some research suggesting minimal environmental impact, while other investigations raised concerns about Decamethyl’s long-term effects.
The regulatory status of Decamethyl continues to evolve as more research is conducted, balancing its industrial importance with environmental safety.

Handling and Storage of Decamethyl:

Handling:
Avoid inhalation, ingestion, and skin or eye contact.
Use in well-ventilated areas and minimize aerosol formation.
Handle with care to prevent spills and ensure proper containment to avoid release into the environment.

Storage:
Store in a cool, dry, well-ventilated place.
Keep containers tightly closed and away from direct sunlight, heat sources, and incompatible materials like strong oxidizers.
Maintain in original packaging or appropriate containers made of suitable materials.

Stability and Reactivity of Decamethyl:

Stability:
Decamethyl is stable under normal temperature and pressure conditions. 
Decamethyl is resistant to hydrolysis and oxidation in neutral or slightly alkaline environments.

Reactivity:
Avoid contact with strong acids, bases, and oxidizing agents as they can break down the silicone structure.
Decomposition products under fire conditions may include carbon oxides and formaldehyde.

Hazardous Decomposition Products:
Thermal decomposition or combustion can produce hazardous fumes including carbon monoxide, carbon dioxide, and silicon dioxide.

First Aid Measures of Decamethyl:

Inhalation:
Move the person to fresh air.
If breathing difficulties persist, seek medical attention.

Skin Contact:
Wash skin thoroughly with soap and water.
Remove contaminated clothing.
Seek medical advice if irritation occurs.

Eye Contact:
Immediately rinse eyes with water for several minutes.
If irritation persists, consult a doctor.

Ingestion:
Do not induce vomiting.
Rinse mouth with water and seek medical help if large amounts are ingested.

Firefighting Measures of Decamethyl:

Extinguishing Media:
Use water spray, foam, dry chemical, or carbon dioxide for extinguishing fires involving Decamethyl.

Specific Hazards:
In a fire, Decamethyl may decompose and release harmful combustion products like silicon dioxide, carbon oxides, and formaldehyde.

Protective Equipment:
Firefighters should wear full protective clothing, including a self-contained breathing apparatus (SCBA), to avoid exposure to fumes and decomposition products.

Accidental Release Measures of Decamethyl:

Personal Precautions:
Wear appropriate personal protective equipment (PPE) such as gloves, goggles, and suitable protective clothing to prevent skin and eye contact.

Environmental Precautions:
Avoid release into waterways, drains, or soil.
Decamethyl may persist in the environment, so take care to limit its spread.

Cleanup Methods:
For small spills, absorb with inert materials (e.g., sand, earth) and place into appropriate containers for disposal.
For large spills, contain and collect the material for recycling or disposal in compliance with local regulations.

Exposure Controls / Personal Protective Equipment of Decamethyl:

Engineering Controls:
Ensure adequate ventilation, particularly in enclosed areas.
Local exhaust ventilation is recommended if misting occurs.

Personal Protective Equipment:

Eye Protection:
Safety glasses or goggles are recommended.

Skin Protection:
Use chemical-resistant gloves and long-sleeved clothing to minimize skin contact.

Respiratory Protection:
If ventilation is inadequate, use an appropriate respiratory protection device.

Hygiene Measures:
Wash hands after handling Decamethyl and before eating or drinking.
Remove contaminated clothing and wash before reuse.

Identifiers of Decamethyl:
CAS Number: 541-02-6
Beilstein Reference: 1800166
ChEMBL: 1885178
ChemSpider: 10451  
DrugBank: DB11244
ECHA InfoCard: 100.007.969  
EC Number: 208-764-9
MeSH: Decamethyl
PubChem CID: 10913
RTECS number: GY5945200
UNII: 0THT5PCI0R  
CompTox Dashboard (EPA): DTXSID1027184

IUPAC Name: 2,2,4,4,6,6,8,8,10,10-decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Alternative Names: Decamethyl
Molecular Formula: C10H30O5Si5
Molar Mass: 370.77 g/mol
InChI: InChI=1S/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3
InChI Key: XMSXQFUHVRWGNA-UHFFFAOYSA-N

Empirical Formula (Hill Notation): C10H30O5Si5
CAS Number: 541-02-6
Molecular Weight: 370.77
Beilstein: 1800166
EC Number: 208-764-9
MDL number: MFCD00046966
PubChem Substance ID: 24868110

Properties of Decamethyl:
Chemical formula: [(CH3)2SiO]5
Molar mass: 370.770 g·mol−1
Appearance    : Colourless liquid
Density: 0.958 g/cm3
Melting point: −47 °C; −53 °F; 226 K
Boiling point: 210 °C (410 °F; 483 K)
Solubility in water: 17.03±0.72 ppb (23 °C) 
log P: 8.07
Vapor pressure: 20.4±1.1 Pa (25 °C)  
Viscosity: 3.74 cP

Vapor density: 6.8
Flash point: 82.7°C (180.86°F) at 101.3 kPa
Flammability limits: Nonflammable
Autoignition temperature: 372°C (701.60°F) at 101.3 kPa
Specific gravity: 0.959 g/cm3 at 20°C (68°F)
Solubility: 17 µg/L at 23°C (73°F) in water; soluble in ethanol, ether, acetone, and benzene; very soluble in pyridine
Partition coefficient: (log Kow) 8.02 at 25.3°C
Stability: Stable
Reactivities and incompatibilities: Oxidizing agents

Quality Level: 100
assay: 97%
form: liquid
refractive index: n20/D 1.396 (lit.)
bp: 90 °C/10 mmHg (lit.)
density: 0.958 g/mL at 25 °C (lit.)
SMILES string: C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
InChI: 1S/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3
InChI key: XMSXQFUHVRWGNA-UHFFFAOYSA-N

Molecular Weight: 370.77     
Hydrogen Bond Donor Count: 0     
Hydrogen Bond Acceptor Count: 5     
Rotatable Bond Count: 0     
Exact Mass: 370.09395673     
Monoisotopic Mass: 370.09395673     
Topological Polar Surface Area: 46.2 Ų     
Heavy Atom Count: 20     
Formal Charge: 0     
Complexity: 258     
Isotope Atom Count: 0     
Defined Atom Stereocenter Count: 0     
Undefined Atom Stereocenter Count: 0     
Defined Bond Stereocenter Count: 0 
Undefined Bond Stereocenter Count: 0     
Covalently-Bonded Unit Count: 1 
Compound Is Canonicalized: Yes    

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