Ingredient Dictionary

TRIMETHYLHEXANOL

3,5,5-Trimethyl-1-hexanol is an aliphatic alcohol.

Definition

3,5,5-Trimethyl-1-hexanol is an aliphatic alcohol.

Source: PubChem

US FDA substance register · UNII O5KUD6I57K · registered name 3,5,5-TRIMETHYL-1-HEXANOL · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Base that dissolves other ingredientsSOLVENTListed as a fragrance-composition material (not a claim that it adds scent)FRAGRANCE

Safety & regulatory references

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

Source: Korea toxic substances GHS register (NIER)

Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

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

Names & identifiers

TRIMETHYLHEXANOLINCI트라이메틸헥산올Korean label name (MFDS standard)1-Hexanol, 3,5,5-trimethyl-Synonym

CAS No.chemical registry number: 1331-39-1
CAS No.chemical registry number: 3452-97-9
EC No.EU chemical inventory number: 222-376-7
DTXSIDUS EPA chemical ID: DTXSID7029661
DTXCIDUS EPA compound ID: DTXCID309661

IUPAC: 3,5,5-Trimethylhexan-1-ol
Molecular formula: C9H20O
Molecular weight: 144.258 g/mol

Measured properties

Melting/freezing point: -70 ℃
Initial boiling point and range: 193~202 ℃
Flash point: 79 ℃(c.c.)
Vapour pressure: 30 ㎩(20℃)
Water solubility: 0.0572 g/100㎖(25℃ (est.))
Vapour density: 5
Relative density: 0.83
n-Octanol/water partition coefficient (Kow): 3.11 (est.)
Molecular weight: 144.25

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 7 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
Fragrance1
Intermediate1
Lubricating agent1
Solvent1
Deodorizer1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 2 eye studies are on record.

Classed as moderate1Classed as low1

The studies disagree (the most common conclusion covers 50%), so they do not establish that this ingredient is irritating. 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 2
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · equivalent or similar to OECD Guideline 406 (Skin Sensitisation)
Category 2A
Eye Irritation · Screening
Category 6.4A (Category 2A)
Eye Irritation · Read Across