Ingredient Dictionary

2-METHYLBUTYRALDEHYDE

2-methylbutanal is a methylbutanal in which the methyl substituent is at position 2.

Definition

2-methylbutanal is a methylbutanal in which the methyl substituent is at position 2. It has a role as a volatile oil component, a Saccharomyces cerevisiae metabolite and a plant metabolite. It is a methylbutanal and a 2-methyl-branched fatty aldehyde.

Source: PubChem

US FDA substance register · UNII 47H597M1YY · registered name 2-METHYLBUTYRALDEHYDE · 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-METHYLBUTYRALDEHYDEINCIButanal, 2-methyl-Synonym

CAS No.chemical registry number: 96-17-3
EC No.EU chemical inventory number: 202-485-6
DTXSIDUS EPA chemical ID: DTXSID2021818
DTXCIDUS EPA compound ID: DTXCID201818

IUPAC: 2-Methylbutanal
Molecular formula: C5H10O
Molecular weight: 86.134 g/mol

Measured properties

Appearance: liquid
Initial boiling point and range: 90 ℃
Flash point: 4 ℃
Vapour pressure: 47.4 ㎜Hg (at 25 ℃ (est.))
Water solubility: (1.12E+004 ㎎/L at 25 ℃ (est.))
Vapour density: 2.97
Relative density: 0.804
n-Octanol/water partition coefficient (Kow): 1.23
Molecular weight: 86.14

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: KOSHA safety data sheets (Korea)

What products actually use it for

What the 6 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.

Fragrance3
Flavouring and nutrient2
Intermediate1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 1 eye studies are on record.

Classed as highly irritating1

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 4 studies

High Frequency of Sensitization
skin sensitisation: in vivo (LLNA) · Screening · according to EPA OPPTS 870.2600 (Skin Sensitisation) according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) according to EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay)
Classification not possible
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
Classification not possible
Eye Irritation · Screening