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Ingredients

Ingredient Dictionary

METHYL ALPHA-IONONE ISOMERS

1-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-1-penten-3-one is a sesquiterpenoid.

Molecular structure

Definition

1-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-1-penten-3-one is a sesquiterpenoid.

Source: PubChem

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

METHYL ALPHA-IONONE ISOMERSINCIIonone, methyl-Synonym
CAS No.chemical registry number
1335-46-2
EC No.EU chemical inventory number
215-635-0
DTXSIDUS EPA chemical ID
DTXSID0029214

Measured properties

Appearance
CBI, Liquid
Boiling point
238.00 °C. @ 760.00 mm Hg
Melting/freezing point
59.38 ℃(est.)

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 305 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.

  • Fragrance305

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

2 skin studies and 0 eye studies are on record.

Classed as moderate1

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 2 studies
  • Category 6.5B (Category 1)
    Skin Sensitization · Read Across
  • SkinSens1
    Skin Sensitization · QSAR Predicted

Source: US EPA CompTox dashboard

Linked databases 6