Ingredient Dictionary

P-METHYL ACETOPHENONE

4'-Methylacetophenone is an aromatic ketone.

Definition

4'-Methylacetophenone is an aromatic ketone.

Source: PubChem

US FDA substance register · UNII AX66V0KX3Y · registered name p-Methyl Acetophenone · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Listed 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

Official labels & definitions

JCIA labelling name メチルアセトフェノン: 本品は、次の化学式で表される芳香族ケトンである。

Source: JCIA labelling names (Japan)

JCIA labelling name ｐ－メチルアセトフェノン: 本品は、次の化学式で表される芳香族ケトンである。

Source: JCIA labelling names (Japan)

Names & identifiers

P-METHYL ACETOPHENONEINCIEthanone, 1-(4-methylphenyl)-Synonymp-메틸아세토페논Korean label name (MFDS standard)ｐ－メチルアセトフェノンJapanese labelling nameメチルアセトフェノンJapanese labelling name

CAS No.chemical registry number: 122-00-9
EC No.EU chemical inventory number: 204-514-8
DTXSIDUS EPA chemical ID: DTXSID9044374
DTXCIDUS EPA compound ID: DTXCID7024374

IUPAC: 1-(4-Methylphenyl)ethan-1-one
Molecular formula: C9H10O
Molecular weight: 134.178 g/mol

Measured properties

Appearance: liquid
Colour: colourless
Melting/freezing point: 22~28 ℃
Initial boiling point and range: 222~226 ℃
Flash point: 92 ℃
Vapour pressure: 0,221 ㎜Hg (at 25C( est.))
Water solubility: 372 ㎎/ℓ (at 15C)
Relative density: 0.996-1.005
n-Octanol/water partition coefficient (Kow): 2.10
Molecular weight: 134.18

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 5 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
Deodorizer1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 1 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 5 studies

Not classified
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
Category 6.3B (Category 3)
Skin Irritation · Read Across
Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · equivalent or similar to OECD Guideline 406 (Skin Sensitisation)
Classification not possible
Eye Irritation · Screening