Ingredient Dictionary

ALPHA-IONONE

Alpha-ionone is an ionone, an enone and a methyl ketone.

How much products actually contain

No product states its amount yet.

Of the products containing it, 1 list it before the 1% line and 10 after it (usually 1% or less).

Products using this ingredient

11 of 11 confirmed · likeliest to carry enough first

Definition

Alpha-ionone is an ionone, an enone and a methyl ketone.

Source: PubChem

US FDA substance register · UNII I9V075M61R · registered name α-Ionone · 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

ALPHA-IONONEINCI알파-아이오논Korean label name (MFDS standard)3-Buten-2-one, 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-, (E)-Synonym

CAS No.chemical registry number: 127-41-3
EC No.EU chemical inventory number: 204-841-6
DTXSIDUS EPA chemical ID: DTXSID0035160
DTXCIDUS EPA compound ID: DTXCID8015160

IUPAC: (3E)-4-(2,6,6-Trimethylcyclohex-2-en-1-yl)but-3-en-2-one
Molecular formula: C13H20O
Molecular weight: 192.302 g/mol

Measured properties

Appearance: Liquid, CBI · colourless to pale-yellow liquid with a warm, woody, violet-floral odour
Odour: It has a warm, woody, floral odor with balsamic and sweet tones and is strongly reminiscent of violet flowers. · Sweet-floral odor, reminiscent of violets
Boiling point: 258 °C at 760 mm Hg · Pale yellow to yellow liquid, Specific gravity: 0.933-0.937 25/25 °C, Boiling point: 126-128 °C at 12 mm Hg /mixed ionone isomers/
Solubility: In water, 106 mg/L at 25 °C · Soluble in alcohol, most fixed oils, propylene glycol, insoluble in glycerin
Density: 0.9319 at 20/4 °C · 0.927-0.933
Stability: Stable under recommended storage conditions.
Colour: colourless
Melting/freezing point: &amp, lt, 25 ℃
Initial boiling point and range: 131 ℃
Flash point: 118 ℃
Water solubility: 1000000 ㎎/ℓ (25 deg c)
Relative density: 0.93
n-Octanol/water partition coefficient (Kow): 3.85

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 20 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.

Fragrance16
Flavouring and nutrient2
Deodorizer2

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

6 skin studies and 5 eye studies are on record.

Classed as low8

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 11 studies

Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · according to other guideline: as mentioned below
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · other guideline: as mentioned below according to
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · according to other guideline: as mentioed below
Not likely to be sensitizing
skin sensitisation · Screening · according to other guideline: as mentioned below
Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · according to other guideline: as mentioned below.
Category 6.4A (Category 2A)
Eye Irritation · Read Across
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: Draize method according to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: Draize Method according to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: as mentioned below equivalent or similar to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to