2-Ethylhexanoic acid
2-Ethylhexanoic acid (CAS: 149-57-5) is a branched-chain carboxylic acid with the molecular formula CH3(CH2)3CH(C2H5)CO2H and a molar mass of 144.21 g/mol. This chemical serves as a versatile building block and intermediate in organic synthesis. It is commonly employed in the production of metal salts, which find applications as driers in paints and varnishes, and in the synthesis of plasticizers and lubricants.
- IUPAC
- 2-Ethylcaproic acid
- Synonyms
- 2-Ethylcaproic acid

Drier Production
2-Ethylhexanoic acid is reacted with metal oxides or hydroxides to form metal 2-ethylhexanoates. These metal salts, such as cobalt, manganese, and zirconium 2-ethylhexanoates, act as effective driers in alkyd resins, inks, and coatings, promoting oxidative curing.
Plasticizer Synthesis
It can be esterified with alcohols to produce plasticizers. These esters contribute to the flexibility and durability of polymers, particularly in PVC applications.
Lubricant Additives
Esters derived from 2-Ethylhexanoic acid are used as synthetic lubricant base stocks or additives, offering good thermal stability and low volatility.
Organic Synthesis Intermediate
As a functionalized carboxylic acid, it is a valuable intermediate for synthesizing more complex organic molecules in various chemical research and development sectors.
| Molecular weight | 144.21 |
|---|---|
| Linear formula | CH3(CH2)3CH(C2H5)CO2H |
| Assay | ≥99% |
| Boiling point | 228 °C(lit.) |
| Density | 0.903 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.425(lit.) |
| Vapour pressure | 10 mmHg (115 °C) |
| Vapour density | 4.98 (vs air) |
| Autoignition temp | 699 °F |



Hazard statements
- H312Harmful in contact with skin
- H318Causes serious eye damage
- H361Suspected of damaging fertility or the unborn child
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 114 °C / 237.2 °F |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 63 |
| Safety statements (S) | 36/37 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 1.04 %, 135 °F8.64 %, 188 °F8.64 %, 188 °F |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2-Ethylhexanoic acid used for?
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2-Ethylhexanoic acid is primarily used in the synthesis of metal salts that act as driers in paints and coatings. It also serves as an intermediate in the production of plasticizers and lubricants.
What is the CAS number and chemical formula for 2-Ethylhexanoic acid?
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The CAS number is 149-57-5, and its chemical formula is CH3(CH2)3CH(C2H5)CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Ethylhexanoic acid with an assay of ≥99%. We do not represent this product as USP, BP, or EP grade.
How should 2-Ethylhexanoic acid be handled safely?
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Handling requires caution due to its hazardous properties. It is harmful in contact with skin and can cause serious eye damage. It is also suspected of damaging fertility or the unborn child. Always use appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, and follow recommended safety statements like P280 and P305 + P351 + P338.
How is 2-Ethylhexanoic acid packed and exported?
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Tech Serve Solutions exports chemicals globally, adhering to all necessary regulations for safe packing and transportation.
How can I request a sample or quote for 2-Ethylhexanoic acid?
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To request a sample or a quotation, please contact our sales team through the website or by phone.
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