Ingredient Dictionary

AMYL ETHYL KETONE

3-octanone is a dialkyl ketone that is octane in which the two methylene protons at position 3 have been replaced by an oxo group.

Definition

3-octanone is a dialkyl ketone that is octane in which the two methylene protons at position 3 have been replaced by an oxo group. It has a role as an antifeedant, an insect attractant, a toxin, a biomarker, a plant metabolite, a fungal metabolite and a human urinary metabolite. It derives from a hydride of an octane.

Source: PubChem

US FDA substance register · UNII 79173B4107 · registered name 3-OCTANONE · 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

AMYL ETHYL KETONEINCI3-OctanoneSynonym

CAS No.chemical registry number: 106-68-3
EC No.EU chemical inventory number: 203-423-0
DTXSIDUS EPA chemical ID: DTXSID3041954
DTXCIDUS EPA compound ID: DTXCID1021954

IUPAC: Octan-3-one
Molecular formula: C8H16O
Molecular weight: 128.215 g/mol

Measured properties

Appearance: Ethyl n-amyl ketone appears as a clear colorless liquid with a pungent odor. Insoluble in water and partially soluble in alcohol. Vapors are denser than air and may have a narcotic effect in high concentrations. Used in making perfumes and as a solvent for nitrocellulose and vinyl resins. · Liquid
Odour: Mild fruity odor
Boiling point: 332.6 to 334.4 °F at 760 mmHg (USCG, 1999) · 167.5 °C
Melting point: -23.00 °C. @ 760.00 mm Hg
Solubility: Slightly miscible (USCG, 1999) · Miscible with ethanol, ether
Density: 0.822 (USCG, 1999) - Less dense than water, will float · 0.820-0.824 at 20 °C/20 °C
Colour: colourless
Melting/freezing point: -18.5 ℃
Initial boiling point and range: 167 ℃(at 749㎜Hg)
Flash point: 43 ℃
Vapour pressure: 2 ㎜Hg (at 20℃)
Water solubility: 2600 ㎎/ℓ
Vapour density: 4.4
Relative density: 0.8221
n-Octanol/water partition coefficient (Kow): 2.22 ((est.))
Auto-ignition temperature: 330 ℃
Viscosity: (0.9 mPas (20 C))
Molecular weight: 128.21

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 9 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.

Fragrance7
Flavouring and nutrient2

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

5 skin studies and 2 eye studies are on record.

Classed as highly irritating1Classed as moderate1Classed as low2

The studies disagree (the most common conclusion covers 25%), 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 7 studies

Not likely to be sensitizing
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) adopted 22 July 2010 according to EU Method B.42 (Skin Sensitisation: Local Lymph Node Assay) No. 440/2008
Not classified
Skin Sensitization · Screening
Category 2
Skin Irritation · Screening
Severe Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) adopted 24 April 2002) according to EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion) No. 440/2008 according to
Category 6.3B (Category 3)
Skin Irritation · Read Across
Classification not possible
Eye Irritation · Screening
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) 24 April 2002 according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) No. 440/2008 according to