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Ingredient Dictionary

T-BUTYL ALCOHOL

Tert-butanol is a tertiary alcohol alcohol that is isobutane substituted by a hydroxy group at position 2.

Molecular structure

How much products actually contain

No product states its amount yet.

Of the products containing it, 21 list it before the 1% line and 201 after it (usually 1% or less).

Products using this ingredient

12 of 222 confirmed · likeliest to carry enough first · See all 222

Definition

Tert-butanol is a tertiary alcohol alcohol that is isobutane substituted by a hydroxy group at position 2. It has a role as a human xenobiotic metabolite. It derives from a hydride of an isobutane.

Source: PubChem

US FDA substance register · UNII MD83SFE959 · registered name tert-Butyl alcohol · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Makes alcohol undrinkableDENATURANTBase that dissolves other ingredientsSOLVENTGives 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)

Reviewed by CIR: Amended Final Report of the Safety Assessment of t-Butyl Alcohol as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report: Amended Safety Assessment of t-Butyl Alcohol as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Report on the Safety Assessment of t-Butyl Alcohol

Source: US Cosmetic Ingredient Review (CIR)

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

Official labels & definitions

JCIA labelling name ｔ－ブタノール: 本品は、次の化学式で表される分岐脂肪族アルコールである。

Source: JCIA labelling names (Japan)

Names & identifiers

T-BUTYL ALCOHOLINCI2-Propanol, 2-methyl-Synonymt-부틸알코올Korean label name (MFDS standard)ｔ－ブタノールJapanese labelling name
CAS No.chemical registry number
75-65-0
EC No.EU chemical inventory number
200-889-7
DTXSIDUS EPA chemical ID
DTXSID8020204
DTXCIDUS EPA compound ID
DTXCID40204
IUPAC
2-Methylpropan-2-ol
Molecular formula
C4H10O
Molecular weight
74.123 g/mol

Measured properties

Appearance
liquid
Odour threshold
73 ppm
Melting/freezing point
25 ℃
Initial boiling point and range
83 ℃
Flash point
15~23 ℃ (c.c.)
Evaporation rate
1.05
Upper/lower flammability or explosive limits
1.7 / 8 %
Vapour pressure
40.7 ㎜Hg (25℃)
Water solubility
100 g/100㎖ (25℃)
Vapour density
2.6
Relative density
0.8
n-Octanol/water partition coefficient (Kow)
0.35
Auto-ignition temperature
470 ℃
Viscosity
5.72 (25℃)
Molecular weight
74.1

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 186 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.

  • No specific technical function80
  • Solubility enhancer60
  • Solvent13
  • Fragrance10
  • Viscosity modifier9
  • Flavouring and nutrient5
  • Intermediate2
  • Fuel2
5 other uses
  • Chemical reaction regulator1
  • UV stabilizer1
  • Plasticizer1
  • Adhesion/cohesion promoter1
  • Fuel agents1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 4 eye studies are on record.

Classed as low2

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 8 studies
  • Not likely to be sensitizing
    skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation)
  • Category 6.3B (Category 3)
    Skin Irritation · Read Across
  • Not classified
    Skin Irritation · Screening
  • Classification not possible
    Skin Sensitization · Screening
  • Category 2A
    Eye Irritation · Screening
  • Severe Irritation
    eye irritation: in vivo · Screening · other guideline: Study used a Modified Draize test with a classification scheme proposed by Kay and Calandra (1962). Interpretation of Eye Irritation Tests. Journal of the Society of Cosmetic Chemists. 13(6), pp. 281-289. according to other guideline: Health Effects Tests Guidelines, US EPA 8/78 according to
  • Category 6.4A (Category 2A)
    Eye Irritation · Read Across
  • Eye Irrit. 2
    Eye Irritation · Authoritative

Source: US EPA CompTox dashboard

Related literature

Linked databases 23

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