2-Methyl-2-pentenoic acid is a methyl-branched fatty acid.
Definition
US FDA substance register · UNII 44I99E898B · registered name 2-METHYL-2-PENTENOIC ACID · single chemical substance
2-Methyl-2-pentenoic acid is a methyl-branched fatty acid. It is a conjugate acid of a 2-methyl-(2E)-pentenoate(1-).
Source: PubChem
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 16957-70-3
- EC No.EU chemical inventory number
- 241-026-4
- DTXSIDUS EPA chemical ID
- DTXSID30884951
- DTXCIDUS EPA compound ID
- DTXCID80210483
- IUPAC
- (2E)-2-Methylpent-2-enoic acid
- Molecular formula
- C6H10O2
- Molecular weight
- 114.144 g/mol
Measured properties
- Appearance
- Liquid · colourless to pale yellow liquid, fruity aroma
- Boiling point
- 123-125 °C (30 mm Hg)
- Solubility
- Slightly soluble in water, soluble in chloroform, carbon disulfide, ether · soluble (in ethanol)
- Density
- 0.976-0.982
- Melting/freezing point
- 24~26 ℃
- Initial boiling point and range
- 123~125 ℃ (at 30 mmHg)
- Flash point
- 108 ℃
- Vapour density
- (&, gt, 1)
- Molecular weight
- 126.16
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: PubChem · KOSHA safety data sheets (Korea)
What products actually use it for
What the 16 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Fragrance16
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
1 skin studies and 0 eye studies are on record.
The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 1 studies
- SkinIrr2
Skin Irritation · QSAR Predicted
Source: US EPA CompTox dashboard
Linked databases 11
- Australian Industrial Chemicals Inventory (AICIS)
- EU CosIng ingredient list 2
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- NIST Chemistry WebBook
- PubChem 2
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata