Ingredient Dictionary

OCTADECANE

Octadecane is a straight-chain alkane carrying 18 carbon atoms.

How much products actually contain

No product states its amount yet.

Of the products containing it, 6 list it before the 1% line and 17 after it (usually 1% or less).

Products using this ingredient

12 of 21 confirmed · likeliest to carry enough first · See all 21

Definition

Octadecane is a straight-chain alkane carrying 18 carbon atoms. It has a role as a plant metabolite and a bacterial metabolite.

Source: PubChem

US FDA substance register · UNII N102P6HAIU · registered name OCTADECANE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Makes skin soft and smoothSKIN CONDITIONING - EMOLLIENTKeeps skin in good condition (CosIng catch-all)SKIN CONDITIONINGGives the product a scentPERFUMINGBase that dissolves other ingredientsSOLVENT

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 オクタデカン: 本品は、飽和直鎖アルカンであり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

OCTADECANEINCI옥타데케인Korean label name (MFDS standard)オクタデカンJapanese labelling name

CAS No.chemical registry number: 593-45-3
EC No.EU chemical inventory number: 209-790-3
DTXSIDUS EPA chemical ID: DTXSID9047172
DTXCIDUS EPA compound ID: DTXCID7027172

IUPAC: Octadecane
Molecular formula: C18H38
Molecular weight: 254.502 g/mol

Measured properties

Appearance: solid
Colour: colourless
Melting/freezing point: 28.2 ℃
Initial boiling point and range: 316.3 ℃
Flash point: &amp, gt, 149 ℃
Water solubility: 0.006 ㎎/ℓ(25℃)
Vapour density: 8.8
Relative density: 0.7768 (28℃)
n-Octanol/water partition coefficient (Kow): 9.180 (est.)
Molecular weight: 254.495

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 11 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.

Fragrance4
Solvent2
Heat stabilizer2
Softener and conditioner2
Flavouring and nutrient1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 4 eye studies are on record.

Classed as low14

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 8 studies

Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion) according to
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to other guideline: s 1500.41 Federal Register Vol. 38, No. 187, of the 27 September 1973, page 27019 according to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: EPA guideline equivalent or similar to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to