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Dipropylene Glycol is a colourless, viscous, practically non-toxic and slightly hygroscopic liquid; melting point -78 C, boiling point 231 C, specific gravity 1.023. It is a isomer mixture of 1,1'-Oxybis(2-propanol) (cas no.108-61-2), 2-(2-Hydroxypropoxy)-1-propanol (106-62-7) and 2,2'-Oxybis(1-propanol) (110-98-5). Dipropylene glycol is miscible in water, alcohols, esters and almost organic solvents and various vegetable oils. It is produced during the manufacture of propylene glycol from propylene oxide along with tripropylene glycol and higher glycols. Dipropylene Glycol is used as a solvent, coupling agent and chemical intermediate. Dipropylene glycol is used as a component in the production of unsaturated polyester resins, alkyd resins, polyurethane polyols, textile auxiliaries and Dibenzoate plasticisers. It is an ingredient of cutting oils, functional fluids, industrial soaps, agricultural insecticidal formulations, defoamers, cosmetics and fragrances. It is used an additive for carburettor fuels as a lubricant and anti-freezing agent. Dipropylene glycol is used as a solvent for printing inks, cellulose acetate, nitrocellulose, lacquers and coatings. In the refinery industry, it is used used as an extraction solvent to extract aromatics.

Dipropylene glycol is a mixture of three isomeric chemical compounds, 4-oxa-2,6-heptandiol, 2-(2-hydroxy-propoxy)-propan-1-ol, and 2-(2-hydroxy-1-methyl-ethoxy)-propan-1-ol. 
It is a colorless, nearly odorless liquid with a high boiling point and low toxicity.

Propylene glycol is a synthetic liquid substance that absorbs water. Propylene glycol is also used to make polyester compounds, and as a base for deicing solutions. Propylene glycol is used by the chemical, food, and pharmaceutical industries as an antifreeze when leakage might lead to contact with food. The Food and Drug Administration (FDA) has classified propylene glycol as an additive that is “generally recognized as safe” for use in food. It is used to absorb extra water and maintain moisture in certain medicines, cosmetics, or food products. It is a solvent for food colors and flavors, and in the paint and plastics industries. Propylene glycol is also used to create artificial smoke or fog used in fire-fighting training and in theatrical productions. Other names for propylene glycol are 1,2-dihydroxypropane, 1,2-propanediol, methyl glycol, and trimethyl glycol. Propylene glycol is clear, colorless, slightly syrupy liquid at room temperature. It may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to produce a vapor. Propylene glycol is practically odorless and tasteless.

Dipropylene glycol finds many uses as a plasticizer, an intermediate in industrial chemical reactions, as a polymerization initiator or monomer, and as a solvent. 
Its low toxicity and solvent properties make it an ideal additive for perfumes and skin and hair care products. 
It is also a common ingredient in commercial fog fluid, used in entertainment industry fog machines.

IUPAC names: 4-Oxa-2,6-heptandiol; 4-Oxa-1,6-heptandiol; 1,1'-Oxybis(1-propanol); 1,1'-Oxybis(2-propanol). CAS Number: 25265-71-8 

Dipropylene glycol is a compound that plays a role in the chemical makeup of most fragrances. It is used to bind and carry the fragrance elements of a perfume, usually one or more essential oils or fragrance oils.

Dipropylene glycol is a type of organic chemical compound that is frequently used as solvent . It comes in two grades, dipropylene glycol (industrial grade) and dipropylene glycol (fragrance grade). Only the fragrance grade is appropriate for use in perfumes.

Dipropylene glycol, fragrance grade, is used as a solvent due to the fact that it is odorless, colorless and has a high boiling point and a low toxicity. Not only can it act as a carrier, it is also a diluent, or a compound used to dilute the strength of fragrance oils.

This compound can be used both by home fragrance makers and commercial fragrance makers. Dipropylene glycol can bind and carry both essential oils and fragrance oils (blended essential oils).

The compound works in perfumes due its ability to help attaching to the fragrance molecules and making them slower to disperse. The strength of a perfume can be changed by raising or lowering the ratio of dipropylene glycol in the formula.

Name: Dipropylene glycol
CAS: 25265-71-8;110-98-5
Molecular Formula: C6H14O3
Molecular Weight: 134.174
25265-71-8 - Names and Identifiers
Name Dipropylene glycol
Synonyms Dipropylene glycol, mixture of isomeric propylene glycol ethers
Diisopropylene glycol
CAS 25265-71-8
EINECS 246-770-3;203-821-4
InChI InChI=1/C6H14O3/c1-5(7)3-9-4-6(2)8/h5-8H,3-4H2,1-2H3/t5-,6-/m0/s1
25265-71-8 - Physico-chemical Properties
Molecular Formula C6H14O3
Molar Mass 134.17 g/mol
Density 1.034g/cm3
Boling Point 230.5°C at 760 mmHg
Flash Point 137.8°C
Solubility MISCIBLE
Vapor Presure 0.0125mmHg at 25°C
Refractive Index 1.445

Chemical formula: C6H14O3
Appearance: colorless liquid
Boiling point: 230.5 °C 
Solubility in water: miscible with water, soluble in ethanol

What Is Dipropylene Glycol?
Dipropylene glycol is a type of alcohol that is used in cosmetics and skincare products to improve the texture and stability of the formulation. 
It is mainly used as a solvent, viscosity-decreasing agent, masking agent, and fragrance ingredient.

What is Di Propylene Glycol?
Di propylene glycol (also known as oyybispropanol, 2,2-dihydroxyisopropylether, 1,1-oxydipropane-2-ol, di-1,2-propylene glycol, and DPG) is a clear, colourless, viscous liquid with a characteristic odour and the formula C6H14O3.  
It is fully miscible in water and is also miscible with many organic solvents.  
This solvency, combined with low toxicity and a low evaporation rate, makes DPG a chemical which is a very useful reactive intermediate in a range of industries.

Dipropylene glycol is a member of the glycol class of compounds. 
Simply put, ‘glycol’ is a term for any organic compound belonging to the alcohol family. 
A glycol, which may also be referred to as a diol, is comprised of two hydroxyls groups attached to different carbon atoms. 
There are many different types of compounds that belong to this family, such as butylene glycol, polyethylene glycol, ethylene glycol, and more. Dipropylene glycol is a colorless, nearly odorless liquid with a high boiling point and low toxicity. 
In addition to use in the cosmetic industry, dipropylene glycol finds many uses as a plasticizer and an intermediate in industrial chemical reactions.

How is it produced?
Di propylene glycol is produced as a byproduct of propylene glycol production which occurs in a propylene oxide hydrolysis process.  Tri propylene glycol is another by-product of this process.

It is estimated that the worldwide capacity for di propylene glycol production is approximately 107,000 tonnes per annum.

Dipropylene Glycol, Regular Grade, is used as a solvent, coupling agent and chemical intermediate. 
Typical applications include:
1. Esterification with benzoic acid to make dipropylene glycol dibenzoate for plasticizers.
2. A reactant in unsaturated polyester resins to add flexibility and hydrolytic stability to the finished resin.
3. Esterification with acrylic acid to make dipropylene glycol diacrylate for radiation cured resin formulations.
4. In dicyclopentadiene-based unsaturated polyester resin systems to add flexibility.
5. An initiator for urethane polyol synthesis using epoxides, and for the polyol in rigid polyurethane foams.
Dipropylene Glycol’s excellent solvency for certain oils, low evaporation rate and low toxicity lend its use in brake fluid formulations, cuttings oils, textile lubricants, printing inks, coatings, industrial soaps and as a solvent for agricultural and insecticidal formulations.

A high-purity product, designed for use in odor-sensitive applications, such as fragrances and cosmetics. The material, a distilled product with purity greater than 99.5% as dipropylene glycol, is a liquid that is colorless, water-soluble, hygroscopic and nearly odorless. This grade of DPG was developed to meet the needs of manufacturers who require consistent high quality for their fragrances and personal care products.

Perfumes and colognes
Skin care – creams, lotions, sun-care products
Deodorants/antiperspirants – roll-on, stick deodorants
Hair care – shampoos, conditioners, styling, coloring products
Shaving products – creams, foams, gels, after-shave lotions
Bath and shower products

Low odor
Low skin irritation potential and low toxicity
Excellent co-solvency for water, oils and hydrocarbons
Kosher and halal certified
Traceable through the entire supply chain
Manufactured in compliance with strict Cosmetics Good Manufacturing Practices

How is it stored and distributed?
Di propylene glycol is generally stored and distributed in stainless steel, aluminium or lined tank cars, tank trucks, or drums.  It has a flash point of 124 °C (closed cup) and a specific gravity of 1.023 and is not classified as dangerous for any mode of transport.

What is Di Propylene Glycol used for?
Di propylene glycol finds use as a chemical intermediate across a range of industries.  It is used as a component in the production of high volume plasticiser and, indeed, 38% of DPG is consumed in this process.  It is also an initiator in urethane polyols, and a reactant in unsaturated polyurethane resins where it adds flexibility and hydrolytic stability.  It is also used for cutting oils, in hydraulic brake fluid production, and is a solvent for agricultural chemicals such as insecticides.  It is also used as a solvent for printing inks, nitrocellulose, cellulose acetate, lacquers and coatings.  It is an ingredient in industrial soaps and also has a role in the refining industry where it is used as an extraction solvent to extract aromatics.

There is also a Fragrance Grade of di propylene glycol which is used in the cosmetics industry where it is an additive in perfumes, and in skin and hair care products, where it binds and carries the fragrance elements of the perfume being used.

Why Is Dipropylene Glycol Used?
In cosmetics and skincare products, dipropylene glycol functions as a solvent, viscosity-decreasing agent, masking agent, and fragrance ingredient.

As a solvent, dipropylene glycol helps to dissolve or suspend other ingredients in a formulation without altering the other ingredients. Dipropylene glycol allows for an even distribution of all ingredients in a cosmetic formulation and provides appropriate consistency for the product. 

Furthermore, solvents like dipropylene glycol are used to thin out formulations and decrease viscosity. The term viscosity corresponds to the concept of the thickness of a product. Decreasing the viscosity of a formulation makes the product more spreadable when applied to the skin or hair. Solvents can also increase the efficacy of active ingredients in a product formulation by enhancing their absorption through the skin.

Dipropylene glycol also functions as a masking agent in cosmetics and personal care products. 
A masking agent is used to disguise the natural smell of the active ingredients, especially those that have an unpleasant smell. 
Sometimes, a masking agent can make a product smell so ‘clean’ that consumers think the product is fragrance-free.

Use: Dipropylene glycol finds many uses as a plasticizer, an intermediate in industrial chemical reactions, as a polymerization initiator or monomer, and as a solvent. 
It also has uses in cosmetics, and commercial fog fluid.

Dipropylene glycol is a mixture of three branched isomers of bis(hydroxypropyl) ether. 
Dipropylene glycol is produced as a byproduct or coproduct in of the manufacture of propylene glycol.
Dipropylene glycol is a colorless, nearly odorless, and slightly viscous liquid with a high boiling point. 
It is completely soluble in water, and can also dissolve oils. 
In addition, dipropylene glycol is hygroscopic and acts as a humectant, which means it absorbs water and increases hydration in products. 
Dipropylene glycol also functions as a plasticizer and as a plasticizer intermediate in the formation of polyurethane polyols to improve flexibility and increase resistance to cracking at low temperatures. 
A plasticizer is a substance that is added to a material to alter its physical properties, mainly to increase flexibility or decrease viscosity. 
These properties make dipropylene glycol a multifunctional ingredient used in a variety of applications and product sectors. 

Dipropylene Glycol (DPG), Regular Grade, is a co-product from the manufacture of monopropylene glycol, involving the high temperature and high pressure hydrolysis of propylene oxide (PO) with excess water. 
Dipropylene glycol regular grade is a distilled product of greater than 99% purity (as DPG), and is available from ATAMAN Chemical Company in drum and bulk quantities.
The colorless, practically odorless, water soluble, medium viscosity and hygroscopic liquid with low vapor pressure and low toxicity, is a mixture of structural isomers (oxybispropanol
CAS 25265-71-8, EINECS 246-770-3), defined by the manufacturing process, and comprising:
1,1'-oxybis-2-propanol (CAS 110-98-5, EINECS 203-821-4)
2,2'-oxybis-1-propanol (CAS 108-61-2)
2-(2-hydroxypropoxy)-1-propanol (CAS 106-62-7)

Chemical Name
Molecular Weight (g/mol)
CAS Number
Distillation Range, 101.3 kPa (1 atm)
Vapor Pressure, 25°C (77°F)
Freezing Point
Pour Point
Density, 25°C (77°F)
 60°C (140°F)
Refractive Index, 20°C (68°F)
Viscosity, 25°C (77°F)
 60°C (140°F)
Specific Heat, 25°C (77°F)
Surface Tension, 25°C (77°F)
Flash Point, Pensky-Martens Closed Cup
Thermal Conductivity, 25°C (77°F)
Electrical Conductivity, 25°C (77°F)
Heat of Formation
Heat of Vaporization, 25°C (77°F)
228–236°C (442–457°F)
0.0021 kPa (0.016 mm Hg)
Super cools
-39°C (-38.2°F)
1.022 g/cm³
0.998 g/cm³
75.0 centipoise (mPa.s)
10.9 centipoise (mPa.s)
2.18 J/(g°K) (0.52 Btu/lb/°F)
35 mN/m (dynes/cm)
124°C (255°F)
0.1672 W/(m°K) (0.09661 Btu/hr ft°F)
< 6 micro S/m
-628 kJ/mol (-150 Kcal /g-mol)
45.4 kJ/mol (257 Btu/lb/°F) 

1,1'-oxy di-2-propanol
2,2'- dihydroxydipropyl ether
2,2'- dihydroxyisopropyl ether
1,1'- dimethyl diethylene glycol
3,3'-oxy dipropan-1-ol
3,3'-oxy dipropanol
oxy dipropanol
1,3- dipropylene glycol
1,2- dipropylene glycol ethers
1-(2- hydroxypropoxy) propan-2-ol
3-(3- hydroxypropoxy)propan-1-ol
bis(2- hydroxypropyl) ether
2-(2- hydroxypropyl)-1-methyl ethanol
  hydroxyprpyl oxypropanol
oxybis propanol
  propanol, 3,3'-oxybis-
1- propanol, 3,3'-oxybis-

Dipropylene Glycol (DPG)
Product Stewardship Summary (CAS number 25265-71-8)
Chemical Formula for Dipropylene Glycol (DPG) C6H14O3

What is Dipropylene Glycol (DPG)?
DPG is a derivative of propylene oxide (PO) and is produced in a two-step process. 
The first step is the reaction of PO with water into a mixture of Monopropylene glycol (MPG) and DPG and the second step is the distillation and purification of the mixture into its two separate components, with MPG being the main component.
DPG consists of three isomers 1,1'-oxidi-2-propanol, 2-(2'-hydroxypropoxy)-1-propanol and 2,2'-oxidi-1-propanol and is a colourless, viscous and odourless liquid. 
It is highly hygroscopic and miscible in all ratios with water and most organic solvents.

How is Dipropylene Glycol (DPG) Used?
Industrial uses of DPG include as a raw material to produce polymers such as polyester and alkyd resins or as plasticizer in other polymers, for example PVC. 
DPG can also be a component in cleaning agents and printing inks or act as a carrier in many other formulations; for example, personal care products such as fragrances, soaps and cosmetics.

Health, Safety and Environmental Considerations
DPG has low acute toxicity by oral, dermal or inhalation routes. It is non-irritating to the skin and eye and there is no evidence of allergic skin reactions. 
DPG is not considered to be carcinogenic or genotoxic, nor does it have effects on fertility or reproduction.
DPG is readily biodegradable, is not expected to bio-accumulate and is of very low toxicity to aquatic organisms.
DPG is not classified as flammable, but will burn at temperatures over 200 - 244°F/90 - 20°C.

Storing and Transporting Dipropylene Glycol (DPG)
Dipropylene glycol is transported by tank truck, rail car and vessel as bulk products and by tank truck and vessel as packed product.
DPG is hygroscopic and requires storage equipped with drying devices to protect the product from humidity. 
Storage temperature should not exceed 104°F/40°C. In cold climates, tank heating devices and insulation must be installed. 

Di propylene glycol (also known as oyybispropanol, 2,2-dihydroxyisopropylether, 1,1-oxydipropane-2-ol, di-1,2-propylene glycol, and DPG) is a clear, colourless, viscous liquid with a characteristic odour and the formula C6H14O3. It is fully miscible in water and is also miscible with many organic solvents. This solvency, combined with low toxicity and a low evaporation rate, makes DPG a chemical which is a very useful reactive intermediate in a range of industries.

Substance name:dipropylene glycol
Trade name:Dipropyleneglycol
EC no:203-821-4
CAS no:110-98-5
HS code:29094980
Synonyms:(1,1′-dimethyldiethylene glycol / 1,1′-oxybis(2-propanol) / 1,1′-oxydi-2-propanol / 1,1′-oxydipropan-2-ol / 2,2′-dihydroxydipropyl ether / 2,2′-dihydroxyisopropyl ether / 2,2-dihydroxyisopropyl ether / 2-propanol, 1,1′-oxybis- / beta,beta’-dihydroxydi-n-propyl ether / bis(2-hydroxypropyl)ether / bis(hydroxypropyl)ether / dipropyleneglycol, mixture of isomers / oxydipropanol

Dipropylene Glycol USP/EP Grade (DPG)
Our dipropylene glycol is a clear, colourless viscous liquid, which is less hygroscopic than other glycols 

Fragrance Grade
Typical Applications
Hair care (shampoos, conditioners, styling, colouring products).
Bath & Shower products.
Pot pourri.
Eye and facial makeup.
Fragrances and perfumes.
Body sprays.
Skin care (creams, lotions, sun-care products).
Room sprays.
Shaving creams, gels, foams and after-shave lotions.
Reed diffuser oils (typically 60-65% of oil is DPG).
Oil burners.

Dipropylene Glycol (perhaps better known as DPG) is fragrance grade and is commonly used as a carrier for fragrances, perfumes and colognes. DPG is excellent fragrance carrier. DPG exhibits good co solvency with water, soap bases, oils, essential oils and absolutes with minimal odor, low skin irritation potential, low toxicity and consistent isomer distribution, making it ideal for use in perfumes and colognes, skin care (creams, lotions, sun care products), deodorants and antiperspirants (roll on, stick deodorants), hair care (shampoos, conditioners, styling, coloring products), shaving products (creams, foams, gels, aftershave lotions) and bath and shower products. 
Chemical name: Di 1,2 Propylene Glycol, 1,1 oxidipropan 2 ol INCI name: Propylene Glycol

Dipropylene glycol
Dowanol DPG
EC Inventory
Propanol, oxybis-
CAS names
Propanol, oxybis-
IUPAC names
1-(2-hydroxypropoxy)propan-2-ol; 2-(2-hydroxypropoxy)propan-1-ol; 2-[(1-hydroxypropan-2-yl)oxy]propan-1-ol
Agent I858
Di propylene glycol
Dipropylen glycol mixture of isomers
Dipropylene Glycol
Dipropylene Glycol
Dipropylene glycol
Dipropylene glycol (DPG)
Dipropylene Glycol, DPG
Dipropylene glycol, DPG
oxydipropanol (DPG)
Oxydipropanol / Dipropylene Glycol
propanol, oxybis-
Reaction products of 2-(2-hydroxypropoxy)propanol,1,1'-oxydipropan-2-ol and 2,2'-oxydipropanol

Trade names
Agent I858
Diporopylene Glycol
Dipropylene Glycol
Dipropylene glycol
Propanol, oxybis-

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Dipropylene glycol is used primarily as an industrial intermediate, but is also used as a substance in consumer products, and as an ingredient in pesticidal formulations. 
Uses of dipropylene glycol as a substance capitalize on its superior performance as a plasticizer as well as properties (e.g., high solvency, high viscosity) that permit dipropylene glycol to act as a functional ingredient of fluids. 
The uses of dipropylene glycol are listed in the following table.

Intermediate Specialty plasticizer Plasticizer 38 %
Intermediate Non-reinforced polyesters Resin monomer 23 %
Substance Cosmetics and Fragrances Humectant,
Emollient10 %
Intermediate Polyurethane polyols Plasticizer 10 %
Intermediate Alkyd resins Resin monomer 7 %
Miscellaneous (e.g., dyes &
inks, paints & coatings;
functional uses in hydraulic
brake fluids; cutting oils)
fluid, coolant
propylene glycol
1,2-Propylene glycol
Methylethyl glycol
Methylethylene glycol
Isopropylene glycol
Monopropylene glycol
Trimethyl glycol
Propylene Glycol USP
Solargard P
Solar Winter BAN
dl-Propylene glycol
Ucar 35
Sentry Propylene Glycol
PG 12
(+-)-Propylene glycol
FEMA No. 2940
alpha-Propylene glycol
Caswell No. 713
1,2-Propylenglykol [German]
CCRIS 5929
HSDB 174
.alpha.-Propylene glycol
Ilexan P
NSC 69860
SDM No. 27
1,2-propane diol
EPA Pesticide Chemical Code 068603
EINECS 200-338-0
S-(+)-Propylene glycol
1,2-Propanediol, ACS reagent
1,2-Propanediol (8CI,9CI)
1, 2-propanediol
(+/-)-Propylene glycol
General lube
1,2-Propanediol, 99%, extra pure
Propylene Glycol (Propane-1,2-diol)
1,2-Propanediol, 99+%, for analysis
1,2 Propanediol
S(+)-Propylene glycol
All purpose lubricant
Polypropylene glycol 1,000
Propylene glycol [USP:JAN]
Propylene glycol [USAN:JAN]
Aliphatic alcohol
Centella Asiatica
Chilisa FE
a-Propylene glycol
1,2 -propanediol
Propylene glycol, USP
Average MW 1000
Propylene glycol (TN)
racemic propylene glycol
Propylene glycol dl-form
racemic 1,2-propanediol
Propylene Glycol 50/50
EC 200-338-0
propylene glycol cefatrizine
3-01-00-02142 (Beilstein Handbook Reference)
Propylene Glycol Reagent Grade
Propylene glycol (JP17/USP)
Glycol, polypropylene (P400)
Glycol, polypropylene (P750)
Inhibited 1,2-propylene glycol
1,2-Propanediol 57-55-6
Glycol, polypropylene (P1200)
Propylene Glycol (Fragrance Grade)
Propylene Glycol, Industrial Grade
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