Ingredient Dictionary

2-ETHYLBUTYRIC ACID

2-Ethylbutanoic acid is a branched-chain fatty acid.

Definition

2-Ethylbutanoic acid is a branched-chain fatty acid.

Source: PubChem

US FDA substance register · UNII IDY8B990KE · registered name 2-ETHYLBUTYRIC ACID · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Gives the product a scentPERFUMING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

More data — names, identifiers, properties, test records, literature

Names & identifiers

2-ETHYLBUTYRIC ACIDINCIButanoic acid, 2-ethyl-Synonym

CAS No.chemical registry number: 88-09-5
EC No.EU chemical inventory number: 201-796-4
DTXSIDUS EPA chemical ID: DTXSID2041418
DTXCIDUS EPA compound ID: DTXCID0021418

IUPAC: 2-Ethylbutanoic acid
Molecular formula: C6H12O2
Molecular weight: 116.16 g/mol

Measured properties

Appearance: Colorless liquid, [Merck Index] Colorless liquid with a rancid odor, [Acros Organics MSDS] · Liquid
Boiling point: 99.00 to 101.00 °C. @ 18.00 mm Hg · 99 °C (18 mm Hg)
Melting point: -15 °C
Solubility: 18 mg/mL at 20 °C · miscible with alcohol, ether, soluble in water 1 ml in 65 ml
Density: 0.917-0.922
Colour: colourless
Melting/freezing point: -32 ℃
Initial boiling point and range: 194 ℃
Vapour pressure: 0.188 ㎜Hg (at 25 C)
Relative density: 0.9239 ()
n-Octanol/water partition coefficient (Kow): 1.68
Molecular weight: 116.16

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 4 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.

Flavouring and nutrient2
Fragrance2

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 2 eye studies are on record.

Classed as low1

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 6 studies

Category 6.3B (Category 3)
Skin Irritation · Read Across
Category 6.3A (Category 2)
Skin Irritation · Read Across
Not classified
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
Category 1
Eye Irritation · Screening
Category 6.4A (Category 2A)
Eye Irritation · Read Across