2-ETHYLHEXANOIC ACID
2-Ethylhexanoic acid is a clear to pale yellow, oily liquid with a mild odor, sparingly soluble in water but readily miscible with most organic solvents, and widely used to produce metal salts (octoates) that act as catalysts, driers, and stabilizers in paints, coatings, PVC formulations, and lubricants.
2-Ethylhexanoic acid also serves as a key intermediate in the manufacture of plasticizers, specialty esters, corrosion inhibitors for automotive coolants, synthetic lubricants, surfactants, and certain pharmaceutical and cosmetic products.
2-Ethylhexanoic acid is a branched-chain saturated carboxylic acid with the formula C8H16O2, typically appearing as a clear to light yellow, viscous liquid with a faint odor and a boiling point of about 228 °C.
CAS Number: 149-57-5
EC Number: 205-743-6
Chemical formula: C8H16O2
Molar mass: 144.214 g/mol−1
Synonyms: 2-ETHYLHEXANOIC ACID, 149-57-5, 2-Ethylcaproic acid, Hexanoic acid, 2-ethyl-, Ethylhexanoic acid, Ethylhexoic acid, 2-Ethylhexoic acid, Butylethylacetic acid, 2-Butylbutanoic acid, 3-Heptanecarboxylic acid, Ethyl hexanoic acid, 2-ethyl-hexoic acid, 2-ethyl hexanoic acid, alpha-Ethylcaproic acid, 2-Ethylhexansaeure, 2-ethyl-hexanoic acid, 125804-07-1, Ethyl hexanoic acid, 2-, 2 ETHYL HEXANOIC ACID, CCRIS 3348, HSDB 5649, alpha-ethyl caproic acid, Kyselina 2-ethylkapronova [Czech], NSC 8881, Kyselina 2-ethylkapronova, EINECS 205-743-6, .alpha.-Ethylcaproic acid, 2-Ethyl-1-hexanoic acid, UNII-01MU2J7VVZ, Kyselina heptan-3-karboxylova [Czech], BRN 1750468, 01MU2J7VVZ, Kyselina heptan-3-karboxylova, AI3-01371, 2-ETHYL HEXOIC ACID,AR, 61788-37-2, DTXSID9025293, CHEBI:89058, Hexanoic acid, 2-ethyl-, (-)-, NSC-8881, EINECS 262-971-9, 2-ethylhexanoicacid, EC 205-743-6, DTXCID805293, 2-Ethylhexanoic acid, >=99%, C8H16O2.1/2Cu, 2-Ethylhexanoic acid, analytical standard, CAS-149-57-5, (+/-)-2-ETHYLHEXANOIC ACID, Hexanoic acid, 2-ethyl-, copper(2++) salt, MFCD00002675, 2-Ethylcapronic acid, 2-Ethyl-Hexonic acid, alpha-Ethylhexanoic acid, EHO (CHRIS Code), .alpha.-Ethylhexanoic acid, SCHEMBL25800, 2-Ethylhexanoic acid, 99%, MLS002415695, 2-Ethylhexanoic acid, Inhalable, CHEMBL1162485, WLN: QVY4 & 2, NSC8881, HMS2267F21, CS-CY-00011, STR05759, 2-ETHYLHEXANOIC ACID [HSDB], Tox21_201406, Tox21_300108, LMFA01020087, LS-869, AKOS009031416, AT29893, CS-W016381, SB44987, SB44994, Hexanoic acid,2-ethyl-, tridecyl ester, NCGC00091324-01, NCGC00091324-02, NCGC00091324-03, NCGC00253985-01, NCGC00258957-01, SMR001252268, Hexanoic acid, 2- ethyl- , tridecyl ester, E0120, FT-0612273, FT-0654390, EN300-20410, Q209384, Ethyl hexanoic acid, 2-; (Butyl ethyl acetic acid), W-109079, Azilsartan K Medoxomil Impurity-7 (2-EHA Impurities), F0001-0703, Z104478072, 18FEB650-7573-4EA0-B0CD-9D8BED766547, 2-Ethylhexanoic acid, Pharmaceutical Secondary Standard; Certified Reference Material
2-Ethylhexanoic acid is a clear to pale yellow, oily liquid with a mild odor, belonging to the class of branched-chain carboxylic acids.
2-Ethylhexanoic acid is sparingly soluble in water but readily miscible with most organic solvents, and has a boiling point of around 228 °C.
2-Ethylhexanoic acid is widely used as an intermediate in the production of metal salts (such as cobalt, zinc, and tin octoates) that function as catalysts, driers, and stabilizers in paints, coatings, PVC formulations, and lubricants.
In addition, 2-ethylhexanoic acid serves as a chemical building block in the synthesis of plasticizers, surfactants, and specialty esters, and is also employed in automotive coolant formulations to prevent corrosion.
While generally stable under normal storage conditions, 2-Ethylhexanoic acid is incompatible with strong oxidizing agents.
Due to potential reproductive toxicity concerns, safe handling practices, proper ventilation, and personal protective equipment are recommended during use.
2-Ethylhexanoic acid is the organic compound with the formula CH3(CH2)3CH(C2H5)CO2H.
2-Ethylhexanoic acid is a carboxylic acid that is widely used to prepare lipophilic metal derivatives that are soluble in nonpolar organic solvents.
2-Ethylhexanoic acid is a colorless viscous oil.
2-Ethylhexanoic acid is supplied as a racemic mixture.
2-Ethylhexanoic acid forms compounds with metal cations that have stoichiometry as metal acetates.
2-Ethylhexanoic acid is a branched-chain fatty acid.
2-Ethylhexanoic acid is a colorless to light yellow liquid with a mild odor.
2-Ethylhexanoic acid will burn though 2-Ethylhexanoic acid may take some effort to ignite.
2-Ethylhexanoic acid is slightly soluble in water.
2-Ethylhexanoic acid is corrosive to metals and tissue.
2-Ethylhexanoic acid is used to make paint dryers and plasticizers.
2-Ethylhexanoic acid is corrosive to metals and tissue.
2-Ethylhexanoic acid is used to make paint dryers and plasticizers.
2-Ethylhexanoic acid is a branched-chain fatty acid.
2-Ethylhexanoic acid, also known as 2-ethylhexanoate or alpha-ethylcaproic acid, belongs to the class of organic compounds known as medium-chain fatty acids.
These are fatty acids with an aliphatic tail that contains between 4 and 12 carbon atoms.
2-Ethylhexanoic acid is a very hydrophobic molecule, practically insoluble in water, and relatively neutral.
2-Ethylhexanoic acid is a potentially toxic compound.
2-Ethylhexanoic acid is the organic compound with the formula CH3(CH2)3CH(C2H5)CO2H.
2-Ethylhexanoic acid is a carboxylic acid that is widely used to prepare lipophilic metal derivatives that are soluble in nonpolar organic solvents.
2-Ethylhexanoic acid is a colorless viscous oil.
2-Ethylhexanoic acid is supplied as a racemic mixture.
2-Ethylhexanoic acid is a colorless to light yellow liquid with a mild odor.
2-Ethylhexanoic acid will burn though it may take some effort to ignite.
2-Ethylhexanoic acid is slightly soluble in water.
2-Ethylhexanoic acid is corrosive to metals and tissue.
2-Ethylhexanoic acid is used to make paint dryers and plasticizers.
2-Ethylhexanoic acid is a branched-chain fatty acid.
2-Ethylhexanoic Acid is a colorless to light yellow, liquid organic compound.
2-Ethylhexanoic acid is widely used in the preparation of metal derivatives that are soluble in nonpolar organic solvents.
The highly toxic, combustible carboxylic acid is used to make paint dryers and plasticizers.
The liquid organic compound has a mild odor, is highly corrosive to metals and tissue, and combustible, but difficult to ignite.
2-Ethylhexoic acid is used in the manufacture of adhesives and sealant chemicals, corrosion inhibitors and anti-scaling agents, intermediates, lubricants and lubricant additives, paint and coating additives, and process regulators.
2-Ethylhexanoic acid, also called 2-EHA, is a commonly used organic compound, mainly to make lipophilic metal by-products that can dissolve in nonionic organic solvents.
2-Ethylhexanoic acid is a carboxylic acid with the formula C8H16O2 with a generally high boiling point and mild odor.
2-Ethylhexanoic acid is a viscous and colorless oil with one carboxylic class found on a C8 carbon chain and is immiscible in water.
2-Ethylhexanoic acid can be used as a substitute for naphthenic acid in some applications.
Industrially, 2-Ethylhexanoic acid is manufactured using propylene, often generated from fossil fuels and other sources which are renewable.
In other words, 2-Ethylhexanoic acid can be more effectively manufactured than naphthenic acid.
2-Ethylhexanoic acid produces metallic compounds that undergo stoichiometry in the form of metal acetates.
In most cases, 2-Ethylhexanoic acid derivatives are used in industrial and organic chemical applications.
The ethyl hexanoate complexes also serve as catalysts in oxidation reactions and polymerizations (as oil drying agents).
As a versatile chemical intermediate, 2-Ethylhexanoic acid has multiple applications, including the following.
2-Ethylhexanoic acid is a branched-chain saturated carboxylic acid that typically appears as a clear to pale yellow, viscous, oily liquid with a faint but characteristic odor.
2-Ethylhexanoic acid has a molecular weight of approximately 144.21 g/mol, a boiling point near 228 °C, and a melting point around −59 °C.
2-Ethylhexanoic acid is only slightly soluble in water (less than 1 g/L at room temperature) but is readily soluble in a wide range of organic solvents such as alcohols, ketones, esters, and hydrocarbons.
2-Ethylhexanoic acid's low volatility and branched structure contribute to its favorable performance in various chemical reactions and formulations.
Industrial applications of 2-ethylhexanoic acid are diverse.
One of 2-Ethylhexanoic acid's primary uses is as a precursor for the synthesis of metal salts, commonly referred to as metal octoates, including cobalt, manganese, zinc, and tin salts.
These metal derivatives are widely used as catalysts, crosslinking agents, and driers in alkyd resin-based paints, varnishes, inks, and polymer curing systems.
The acid is also employed in the preparation of high-performance lubricants, synthetic esters, and plasticizers, as well as in surfactants and corrosion inhibitors.
In the automotive sector, 2-Ethylhexanoic acid plays a role in extended-life engine coolants and antifreeze formulations, where it helps protect metal components such as aluminum, copper, and brass against corrosion.
Market Overview of 2-Ethylhexanoic Acid:
The global 2-ethylhexanoic acid market is experiencing steady growth, driven by its widespread use in metal salts (octoates) for paints and coatings, plasticizers, lubricants, corrosion inhibitors, and specialty esters.
Asia-Pacific remains the dominant consumer and producer, supported by rapid infrastructure development, a strong PVC industry, and growing automotive manufacturing, while North America and Europe maintain stable demand through established coatings and lubricant sectors.
Market size estimates vary widely depending on the scope of measurement, with recent reports valuing it between USD 674 million and USD 5.61 billion in 2022–2024, and forecasts projecting growth to USD 1.05–6.59 billion by 2032–2034 at CAGRs ranging from 0.6% to over 6%.
Rising construction activity, expansion in automotive coolant and lubricant applications, and increased demand in pharmaceuticals are key growth drivers, although stricter environmental regulations on solvent-based coatings in some regions may restrain expansion.
Overall, the industry outlook remains positive, with moderate to strong growth potential across diverse end-use sectors.
Uses of 2-Ethylhexanoic Acid:
2-Ethylhexanoic acid is a versatile industrial chemical valued for its branched molecular structure, good solubility in organic media, and ability to form stable metal complexes, enabling applications across multiple sectors.
One of 2-Ethylhexanoic acid's primary uses is in the production of metal salts, such as cobalt, zinc, tin, and manganese octoates, which serve as catalysts, driers, and stabilizers in alkyd resin-based paints, varnishes, inks, adhesives, and polymer curing systems.
2-Ethylhexanoic acid is also an important intermediate in the manufacture of plasticizers and specialty esters, particularly for flexible PVC products and high-performance synthetic lubricants used in automotive and industrial machinery.
In the automotive sector, 2-Ethylhexanoic acid plays a critical role in corrosion inhibitor formulations for engine coolants and antifreeze, protecting metals like aluminum, copper, and brass.
Additionally, 2-Ethylhexanoic acid is used in surfactants and emulsifiers for cleaning and formulation chemistry, as well as in the pharmaceutical industry as a chemical intermediate in drug synthesis.
In some cases, 2-Ethylhexanoic acid is incorporated into cosmetic and personal care products as an emollient or fragrance component, further highlighting its adaptability across diverse end-use markets.
2-Ethylhexanoic acid is used in the preparation of metal derivatives, which act as a catalyst in polymerization reactions.
For example, tin 2-Ethylhexanoic acid is used in the manufacturing of poly(lactic-co-glycolic acid).
2-Ethylhexanoic acid is also used as a stabilizer for polyvinyl chlorides.
2-Ethylhexanoic acid is also involved in solvent extraction and dye granulation.
Further, 2-Ethylhexanoic acid is used to prepare plasticizers, lubricants, detergents, flotation aids, corrosion inhibitors and alkyd resins.
In addition to this, 2-Ethylhexanoic acid serves as a catalyst for polyurethane foaming.
2-Ethylhexanoic acid can be used:
2-Ethylhexanoic acid is used as a reactant in esterification , decarboxylative alkynylation , and preparation of alkyl coumarins via decarboxylative coupling reactions.
2-Ethylhexanoic acid is used in the organocatalytic medium for the preparation of various 3,4-dihydropyrimidin-2(1H)-ones/thiones by Biginelli reaction.
2-Ethylhexanoic acid is used in paint and varnish driers (metallic salts).
2-Ethylhexanoic acid's esters are used as plasticizers.
Automotive:
2-Ethylhexanoic acid is used to produce corrosion inhibitors for lubricants and automotive coolants.
2-Ethylhexanoic acid also serves as wood preservatives and makes lubricant additives as well as synthetic lubricants.
2-Ethylhexanoic acid is also used in the production of PVC heat stabilizers, PVB film plasticizers, metal soaps for paint driers, and other chemicals.
Lubricants:
2-Ethylhexanoic acid is commonly used in esters in Polyvinyl butyral (PVB) film plasticizers and as a raw material for polyesters applied in synthetic oils.
2-Ethylhexanoic acid’s metal salts are used to prepare synthetic lubricant additives used in various industrial lubricant applications.
Coatings:
2-Ethylhexanoic acid is widely used in coating applications to enhance performance and resistance.
2-Ethylhexanoic acid produces alkyd resins that help improve yellowing resistance better than ordinary fatty acids.
2-Ethylhexanoic acid is ideal for stoving enamels and 2-component coatings.
2-Ethylhexanoic acid can also be used in other applications, including the catalyst for polyurethane, wood preservatives, and pharmaceuticals.
Cosmetics:
The chemicals in 2-ethylhexanoic acid are reported to have cosmetic use to produce emollients and skin conditioners.
2-Ethylhexanoic acid is widely used in hair care products, hand creams, face creams, body lotions, and make-up products like foundation, concealer, and hair care products.
Plastics:
2-Ethylhexanoic acid is also used in manufacturing polyvinyl chloride (PVC) stabilizers and Polyvinyl butyral (PVB) plasticizers in the form of metal salts.
2-Ethylhexanoic acid reacts with metallic components like manganese and cobalt to produce metallic salt derivatives.
Benefits of 2-Ethylhexanoic Acid:
2-Ethylhexanoic acid offers several benefits that make it valuable across industrial applications.
2-Ethylhexanoic acid's branched molecular structure enhances chemical stability and improves compatibility with a wide range of organic solvents and resins.
2-Ethylhexanoic acid has a strong ability to form stable and soluble metal complexes, which is crucial for producing efficient metal octoates used as catalysts, driers, and stabilizers in coatings and polymer systems.
2-Ethylhexanoic acid’s low volatility and high boiling point contribute to safe handling and long-lasting performance in high-temperature or extended-use applications, such as lubricants and synthetic esters.
2-Ethylhexanoic acid's hydrophobic character improves moisture resistance in formulations, enhancing durability in paints, varnishes, and corrosion protection systems.
In automotive coolants, 2-Ethylhexanoic acid provides long-term corrosion protection for metals including aluminum and copper, extending equipment life.
Furthermore, 2-Ethylhexanoic acid's versatility as a chemical intermediate allows it to serve multiple industries—from coatings and lubricants to pharmaceuticals and personal care—reducing the need for separate specialized chemicals.
This combination of stability, reactivity, and adaptability makes 2-ethylhexanoic acid a cost-effective and multifunctional industrial raw material.
Production of 2-Ethylhexanoic Acid:
2-Ethylhexanoic acid is typically produced through an oxo (hydroformylation) process followed by oxidation, starting from propylene as the primary raw material.
In the first stage, propylene reacts with synthesis gas (a mixture of carbon monoxide and hydrogen) in the presence of a cobalt or rhodium-based catalyst to form butyraldehyde.
This aldehyde undergoes aldol condensation to yield 2-ethylhexenal, which is then subjected to hydrogenation to produce 2-ethylhexanol.
The final step involves oxidizing 2-ethylhexanol, usually with air or oxygen in the presence of a catalyst (commonly cobalt or manganese salts), to produce 2-ethylhexanoic acid with high yield and purity.
An alternative route involves the aldol condensation of n-butyraldehyde (itself derived from oxo synthesis) to 2-ethylhexenal, followed by oxidation without the hydrogenation step, though this is less common in large-scale operations.
Commercial production is carried out in continuous reactors to maintain consistent product quality, and process parameters are optimized to control branching, minimize by-products, and ensure efficient catalyst recovery.
The resulting acid is then purified by fractional distillation under reduced pressure to remove unreacted alcohols and aldehydes, yielding the clear, viscous liquid used in downstream applications.
History of 2-Ethylhexanoic Acid:
The history of 2-ethylhexanoic acid is closely tied to the development of oxo synthesis (hydroformylation) technology in the early 20th century.
The oxo process, discovered in 1938 by German chemist Otto Roelen at Ruhrchemie, was originally used to produce aldehydes from olefins and synthesis gas.
During and after World War II, this method became an important route for producing butyraldehyde, a key precursor for 2-ethylhexanol.
By the 1950s and 1960s, chemical companies had refined the process to convert 2-ethylhexanol into 2-Ethylhexanoic acid's corresponding carboxylic acid through controlled oxidation, creating 2-ethylhexanoic acid on an industrial scale.
Initially, the acid found niche uses in specialty esters and lubricants, but 2-Ethylhexanoic acid's ability to form stable, oil-soluble metal salts soon made it a vital raw material for the coatings industry, particularly as a component in metal octoates for alkyd resin paints and varnishes.
In the 1970s and 1980s, demand expanded rapidly with the growth of synthetic lubricants, PVC stabilizers, and corrosion inhibitors in automotive coolants.
By the late 20th century, 2-ethylhexanoic acid production had become a globally integrated chemical industry, with major facilities in Europe, North America, and later Asia.
Today, 2-Ethylhexanoic acid’s production and use are still rooted in the same oxo-derived pathway developed in the mid-1900s, but modern plants employ high-efficiency catalysts, continuous oxidation reactors, and advanced purification systems to meet stricter quality, safety, and environmental standards, reflecting over 80 years of technological evolution.
Handling and Storage of 2-Ethylhexanoic Acid:
Handling:
Avoid breathing vapors or mist.
Prevent skin and eye contact.
Use only with adequate ventilation.
Keep away from heat, sparks, and open flames.
Do not eat, drink, or smoke while handling 2-Ethylhexanoic acid.
Storage:
Store in tightly closed, corrosion-resistant containers in a cool, dry, and well-ventilated area.
Protect from moisture and direct sunlight.
Keep away from strong oxidizing agents, strong bases, and reactive metals.
Stability and Reactivity of 2-Ethylhexanoic Acid:
Chemical Stability:
Stable under normal temperatures and pressures.
Possibility of Hazardous Reactions:
No hazardous polymerization expected.
May react with strong oxidizers, strong bases, and reducing agents.
Conditions to Avoid:
Excessive heat, open flames, sparks, and prolonged exposure to air or light.
Incompatible Materials:
Strong oxidizing agents, strong bases, reactive metals.
Hazardous Decomposition Products:
Carbon oxides (CO, CO₂) upon combustion.
First Aid Measures of 2-Ethylhexanoic Acid:
Inhalation:
Move the exposed person to fresh air.
If breathing is difficult, administer oxygen.
Seek medical attention if symptoms persist.
Skin Contact:
Remove contaminated clothing.
Wash skin with soap and plenty of water for at least 15 minutes.
Seek medical attention if irritation develops.
Eye Contact:
Rinse cautiously with water for several minutes, removing contact lenses if present and easy to do.
Continue rinsing and seek medical attention immediately.
Ingestion:
Rinse mouth with water.
Do not induce vomiting.
Seek medical attention immediately.
Firefighting Measures of 2-Ethylhexanoic Acid:
Suitable Extinguishing Media:
Use foam, dry chemical powder, or carbon dioxide (CO₂).
Water spray may be used to cool containers.
Specific Hazards:
Vapors may form explosive mixtures with air at high temperatures.
Combustion produces irritating or toxic fumes (CO, CO₂).
Protective Equipment for Firefighters:
Wear self-contained breathing apparatus (SCBA) and full protective gear.
Accidental Release Measures of 2-Ethylhexanoic Acid:
Personal Precautions:
Evacuate unnecessary personnel.
Wear appropriate PPE including gloves, goggles, and respiratory protection if needed.
Environmental Precautions:
Prevent entry into waterways, drains, or soil.
Notify authorities if significant quantities enter the environment.
Methods for Containment/Cleaning:
Contain the spill with inert absorbent material (e.g., sand, vermiculite).
Collect into suitable labeled containers for disposal.
Wash spill area with water after material pickup.
Exposure Controls / Personal Protective Equipment of 2-Ethylhexanoic Acid:
Engineering Controls:
Use local exhaust ventilation or process enclosures to maintain airborne concentrations below exposure limits.
Respiratory Protection:
If ventilation is inadequate, use an approved organic vapor respirator.
Hand Protection:
Wear chemical-resistant gloves (e.g., nitrile or neoprene).
Eye Protection:
Use safety goggles or face shield.
Skin/Body Protection:
Wear protective clothing resistant to chemical penetration.
Hygiene Measures:
Wash hands and exposed skin thoroughly after handling.
Remove contaminated clothing and wash before reuse.
Identifiers of 2-Ethylhexanoic Acid:
Chemical Name: 2-Ethylhexanoic acid
Molecular Formula: C₈H₁₆O₂
Molecular Weight: 144.21 g/mol
CAS Number: 149-57-5
EC Number: 205-743-6
UN Number: Not classified as dangerous goods under UN transport regulations
HS Code: 29163900 (Carboxylic acids and their derivatives – other)
PubChem CID: 8178
InChI: InChI=1S/C8H16O2/c1-3-4-5-6-7(2)8(9)10/h7H,3-6H2,1-2H3,(H,9,10)
InChI Key: BNBDHRZRGFVVNH-UHFFFAOYSA-N
SMILES: CCCCCC(C)C(=O)O
REACH Registration No.: 01-2119488942-23-XXXX (for registered manufacturers/importers in the EU)
IUPAC Name: 2-ethylhexanoic acid
Synonyms: 2-ethylcaproic acid, branched octanoic acid, 2-EHA
Molecular Formula: C₈H₁₆O₂
Molecular Weight: 144.21 g/mol
CAS Number: 149-57-5
EC Number: 205-743-6
PubChem CID: 8178
ChemSpider ID: 7881
UN Number: Not classified as hazardous for transport under UN Model Regulations
HS Code: 29163900 (Carboxylic acids and their derivatives – other)
InChI: InChI=1S/C8H16O2/c1-3-4-5-6-7(2)8(9)10/h7H,3-6H2,1-2H3,(H,9,10)
InChI Key: BNBDHRZRGFVVNH-UHFFFAOYSA-N
Canonical SMILES: CCCCCC(C)C(=O)O
Beilstein Registry Number: 1723609
Merck Index Number: 3768
Properties of 2-Ethylhexanoic Acid:
Chemical formula: C8H16O2
Molar mass: 144.214 g•mol−1
Appearance: Colorless liquid
Density: 903 mg mL−1
Melting point: −59.00 °C; −74.20 °F; 214.15 K
Boiling point: 228.1 °C; 442.5 °F; 501.2 K
log P: 2.579
Vapor pressure: <1 Pa (at 25 °C)
Acidity (pKa): 4.819
Basicity (pKb): 9.178
Refractive index (nD): 1.425
XLogP3: 2.6
Hydrogen Bond Donor Count: 1
Hydrogen Bond Acceptor Count: 2
Rotatable Bond Count: 5
Exact Mass: 144.115029749 g/mol
Monoisotopic Mass: 144.115029749 g/mol
Topological Polar Surface Area: 37.3Ų
Heavy Atom Count: 10
Complexity: 99.4
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 1
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes
Appearance: Colorless liquid
Odor: Characteristic
Purity: 99% min
Melting Point: -78°C
Boiling Point: 227-228°C
Density (20°C): 0.894 g/cm³
Flash Point: 112°C
Solubility in Water: Negligible
Solubility in Organic Solvents: Miscible
Physical description: A colorless to light yellow liquid with a mild odor.
Boiling point: 442°F
Hill Formula: C₈H₁₆O₂
Molar Mass: 144.21 g/mol
HS Code: 2915 90 21
Boiling point: 226 - 229 °C (1013 hPa)
Density: 0.906 g/cm³ (20 °C)
Explosion limit: 0.9 - 6.7 %(V)
Flash point: 114 °C
Ignition temperature: 310 °C
Melting Point: -59 °C
pH value: 3 (1.4 g/l, H₂O, 20 °C)
Vapor pressure: <0.01 hPa (20 °C)
Solubility: 1.4 g/l
Appearance: Colorless clear liquid (est)
Assay: 99.00 to 100.00
Food Chemicals Codex Listed: No
Specific Gravity: 0.89300 to 0.91300 @ 25.00 °C
Pounds per Gallon - (est.): 7.431 to 7.597
Refractive Index: 1.42000 to 1.42600 @ 20.00 °C
Melting Point: -59.00 °C @ 760.00 mm Hg
Boiling Point: 220.00 to 223.00 °C @ 760.00 mm Hg
Vapor Pressure: 0.030000 mmHg @ 20.00 °C
Vapor Density: 4.98 (Air = 1)
Flash Point: 244.00 °F TCC (117.78 °C)
Refractive index: n20/D 1.425 (lit.)
Flash point: 230 °F
Storage temp.: Store below +30°C
Solubility: 1.4 g/l
Form: Liquid
pKa: pK1: 4.895 (25°C)
Color: Clear
pH: 3 (1.4 g/l, H2O, 20℃)
Odor: Mild odor
pH Range: 3 at 1.4 g/l at 20 °C
Viscosity: 7.73 cps
Explosive limit: 1.04%, 135°F
Water Solubility: 2 g/L (20 ºC)
BRN: 1750468
Exposure limits: ACGIH: TWA 5 mg/m³
Stability: Stable. Combustible. Incompatible with strong oxidizing agents,
reducing agents, bases.
InChIKey: OBETXYAYXDNJHR-UHFFFAOYSA-N
LogP: 2.7 at 25℃
CAS DataBase Reference: 149-57-5 (CAS DataBase Reference)
EWG's Food Scores: 2
FDA UNII: 01MU2J7VVZ
NIST Chemistry Reference: Hexanoic acid, 2-ethyl- (149-57-5)
EPA Substance Registry System: 2-Ethylhexanoic acid (149-57-5)
Thermochemistry of 2-Ethylhexanoic Acid:
Std enthalpy of formation (ΔfH⦵298): −635.1 kJ mol−1
Std enthalpy of combustion (ΔcH⦵298): -4.8013–4.7979 MJ mol−1
Molecular Weight: 144.21 g/mol
