Ingredient Dictionary

2-METHYLBUTANOL

2-methylbutan-1-ol is a primary alcohol that is isopentane substituted by a hydroxy group at position 1.

Definition

2-methylbutan-1-ol is a primary alcohol that is isopentane substituted by a hydroxy group at position 1. It has a role as a Saccharomyces cerevisiae metabolite. It is a primary alcohol and an alkyl alcohol. It derives from a hydride of an isopentane.

Source: PubChem

US FDA substance register · UNII 7VTJ239ASU · registered name 2-METHYL-1-BUTANOL · 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-METHYLBUTANOLINCI1-Butanol, 2-methyl-Synonym

CAS No.chemical registry number: 137-32-6
EC No.EU chemical inventory number: 205-289-9
DTXSIDUS EPA chemical ID: DTXSID5027069
DTXCIDUS EPA compound ID: DTXCID107069

IUPAC: 2-Methylbutan-1-ol
Molecular formula: C5H12O
Molecular weight: 88.15 g/mol

Measured properties

Appearance: Liquid · Colorless liquid, [Hawley]
Boiling point: 128 °C @ 760 MM HG · 128.00 to 130.00 °C. @ 760.00 mm Hg
Melting point: FREEZING POINT: LESS THAN -70 °C
Solubility: MISCIBLE WITH ALC & ETHER · Sol in acetone
Density: 0.816 @ 20 °C/4 °C · Relative density (water = 1): 0.8
Colour: colourless
Melting/freezing point: &amp, lt, -70 ℃
Initial boiling point and range: 128 ℃
Flash point: 50 ℃(o.c.)
Upper/lower flammability or explosive limits: 9.0 / 1.4 %
Vapour pressure: 3 ㎜Hg ( at 20 C)
Water solubility: 29.7 g/100㎖ ( at 25 C)
Vapour density: 3
Relative density: 0.186
n-Octanol/water partition coefficient (Kow): 1.29
Auto-ignition temperature: (385)
Viscosity: 3.59 cP (30 C)
Molecular weight: 88.15

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 10 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.

Solvent4
Fragrance3
Flavouring and nutrient2
Intermediate1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 2 eye studies are on record.

Classed as highly irritating2Classed as low1

The study conclusions largely agree (67%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 5 studies

Severe Irritation
skin irritation: in vivo · Screening · other guideline: Federal Register 28, No . 187, s 1500 .41, S . 27029, 1973 according to
Classification not possible
Skin Sensitization · Screening
Not classified
Skin Irritation · Screening
Severe Irritation
eye irritation: in vivo · Screening · other guideline: Federal Register 38, No 187, s 1500.41, S. 27019 (27/09/1973) according to
Category 2
Eye Irritation · Screening