PRODUCTS

2-ETHYLCAPROIC ACID

2-Ethylcaproic acid is a branched-chain saturated carboxylic acid, typically appearing as a clear to pale yellow, viscous, oily liquid with a mild odor, a boiling point near 228 °C, and low water solubility.
2-Ethylcaproic acid is primarily used as an intermediate in the production of metal salts (such as cobalt, zinc, manganese, and tin octoates), which serve as catalysts, driers, and stabilizers in paints, coatings, inks, lubricants, and polymer systems.
Beyond coatings, 2-Ethylcaproic acid is employed in the synthesis of plasticizers, surfactants, synthetic esters, and automotive coolant formulations, where it helps protect metals from corrosion.

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-Ethylcaproic acid is a clear to pale yellow, oily liquid with a mild odor, belonging to the class of branched-chain carboxylic acids.
2-Ethylcaproic acid is sparingly soluble in water but readily miscible with most organic solvents, and has a boiling point of around 228 °C.

2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic acid is the organic compound with the formula CH3(CH2)3CH(C2H5)CO2H.
2-Ethylcaproic acid is a carboxylic acid that is widely used to prepare lipophilic metal derivatives that are soluble in nonpolar organic solvents.
2-Ethylcaproic acid is a colorless viscous oil.

2-Ethylcaproic acid is supplied as a racemic mixture.
2-Ethylcaproic acid forms compounds with metal cations that have stoichiometry as metal acetates.

2-Ethylcaproic acid is a branched-chain fatty acid.
2-Ethylcaproic acid is a colorless to light yellow liquid with a mild odor.

2-Ethylcaproic acid will burn though 2-Ethylcaproic acid may take some effort to ignite.
2-Ethylcaproic acid is slightly soluble in water.

2-Ethylcaproic acid is corrosive to metals and tissue.
2-Ethylcaproic acid is used to make paint dryers and plasticizers.

2-Ethylcaproic acid is corrosive to metals and tissue.
2-Ethylcaproic acid is used to make paint dryers and plasticizers.
2-Ethylcaproic acid is a branched-chain fatty acid.

2-Ethylcaproic 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-Ethylcaproic acid is a very hydrophobic molecule, practically insoluble in water, and relatively neutral.
2-Ethylcaproic acid is a potentially toxic compound.

2-Ethylcaproic acid is a colorless viscous oil.
2-Ethylcaproic acid is supplied as a racemic mixture.

2-Ethylcaproic acid is a colorless to light yellow liquid with a mild odor.
2-Ethylcaproic acid will burn though it may take some effort to ignite.

2-Ethylcaproic acid is slightly soluble in water.
2-Ethylcaproic acid is corrosive to metals and tissue.
2-Ethylcaproic acid is used to make paint dryers and plasticizers.

2-Ethylcaproic acid is a branched-chain fatty acid.
2-Ethylcaproic acid is a colorless to light yellow, liquid organic compound.

2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic acid is a carboxylic acid with the formula C8H16O2 with a generally high boiling point and mild odor.

2-Ethylcaproic acid is a viscous and colorless oil with one carboxylic class found on a C8 carbon chain and is immiscible in water.
2-Ethylcaproic acid can be used as a substitute for naphthenic acid in some applications.

Industrially, 2-Ethylcaproic acid is manufactured using propylene, often generated from fossil fuels and other sources which are renewable.
In other words, 2-Ethylcaproic acid can be more effectively manufactured than naphthenic acid.

2-Ethylcaproic acid produces metallic compounds that undergo stoichiometry in the form of metal acetates.
In most cases, 2-Ethylcaproic 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-Ethylcaproic acid has multiple applications, including the following.

2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic acid's low volatility and branched structure contribute to its favorable performance in various chemical reactions and formulations.

Industrial applications of 2-Ethylcaproic acid are diverse.
One of 2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic Acid:
The global 2-Ethylcaproic 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-Ethylcaproic Acid:
2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic acid plays a critical role in corrosion inhibitor formulations for engine coolants and antifreeze, protecting metals like aluminum, copper, and brass.

Additionally, 2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic acid is used in the preparation of metal derivatives, which act as a catalyst in polymerization reactions.
For example, tin 2-Ethylcaproic acid is used in the manufacturing of poly(lactic-co-glycolic acid).

2-Ethylcaproic acid is also used as a stabilizer for polyvinyl chlorides.
2-Ethylcaproic acid is also involved in solvent extraction and dye granulation.

Further, 2-Ethylcaproic acid is used to prepare plasticizers, lubricants, detergents, flotation aids, corrosion inhibitors and alkyd resins.
In addition to this, 2-Ethylcaproic acid serves as a catalyst for polyurethane foaming.

2-Ethylcaproic acid can be used:
2-Ethylcaproic acid is used as a reactant in esterification , decarboxylative alkynylation , and preparation of alkyl coumarins via decarboxylative coupling reactions.
2-Ethylcaproic acid is used in the organocatalytic medium for the preparation of various 3,4-dihydropyrimidin-2(1H)-ones/thiones by Biginelli reaction.

2-Ethylcaproic acid is used in paint and varnish driers (metallic salts).
2-Ethylcaproic acid's esters are used as plasticizers.

Automotive:
2-Ethylcaproic acid is used to produce corrosion inhibitors for lubricants and automotive coolants.
2-Ethylcaproic acid also serves as wood preservatives and makes lubricant additives as well as synthetic lubricants.
2-Ethylcaproic acid is also used in the production of PVC heat stabilizers, PVB film plasticizers, metal soaps for paint driers, and other chemicals.

Lubricants:
2-Ethylcaproic acid is commonly used in esters in Polyvinyl butyral (PVB) film plasticizers and as a raw material for polyesters applied in synthetic oils.
2-Ethylcaproic acid’s metal salts are used to prepare synthetic lubricant additives used in various industrial lubricant applications.

Coatings:
2-Ethylcaproic acid is widely used in coating applications to enhance performance and resistance.
2-Ethylcaproic acid produces alkyd resins that help improve yellowing resistance better than ordinary fatty acids.

2-Ethylcaproic acid is ideal for stoving enamels and 2-component coatings.
2-Ethylcaproic acid can also be used in other applications, including the catalyst for polyurethane, wood preservatives, and pharmaceuticals.

Cosmetics:
The chemicals in 2-Ethylcaproic acid are reported to have cosmetic use to produce emollients and skin conditioners.
2-Ethylcaproic 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-Ethylcaproic acid is also used in manufacturing polyvinyl chloride (PVC) stabilizers and Polyvinyl butyral (PVB) plasticizers in the form of metal salts.
2-Ethylcaproic acid reacts with metallic components like manganese and cobalt to produce metallic salt derivatives.

Benefits of 2-Ethylcaproic Acid:
2-Ethylcaproic acid offers several benefits that make it valuable across industrial applications.
2-Ethylcaproic acid's branched molecular structure enhances chemical stability and improves compatibility with a wide range of organic solvents and resins.

2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic acid's hydrophobic character improves moisture resistance in formulations, enhancing durability in paints, varnishes, and corrosion protection systems.
In automotive coolants, 2-Ethylcaproic acid provides long-term corrosion protection for metals including aluminum and copper, extending equipment life.

Furthermore, 2-Ethylcaproic 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-Ethylcaproic acid a cost-effective and multifunctional industrial raw material.

Production of 2-Ethylcaproic Acid:
2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic Acid:
The history of 2-Ethylcaproic 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-Ethylcaproic acid's corresponding carboxylic acid through controlled oxidation, creating 2-Ethylcaproic acid on an industrial scale.

Initially, the acid found niche uses in specialty esters and lubricants, but 2-Ethylcaproic 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-Ethylcaproic acid production had become a globally integrated chemical industry, with major facilities in Europe, North America, and later Asia.

Today, 2-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic 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-Ethylcaproic Acid:
Chemical Name: 2-Ethylcaproic 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-Ethylcaproic acid
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-Ethylcaproic 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: 37.3Å²
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-Ethylcaproic acid (149-57-5)

Thermochemistry of 2-Ethylcaproic 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