Ingredient Dictionary

ISOOCTANE

Isooctane is an alkane that consists of pentane bearing two methyl substituents at position 2 and a single methyl substituent at position 4.

How much products actually contain

No product states its amount yet.

Of the products containing it, 0 list it before the 1% line and 1 after it (usually 1% or less).

Products using this ingredient

1 of 1 confirmed · likeliest to carry enough first

DonginbiRed Ginseng Moisture Cleansing Oil

Definition

Isooctane is an alkane that consists of pentane bearing two methyl substituents at position 2 and a single methyl substituent at position 4. It has a role as a non-polar solvent, a nephrotoxic agent and a fuel additive. It is a volatile organic compound and an alkane.

Source: PubChem

US FDA substance register · UNII QAB8F5669O · registered name 2,2,4-TRIMETHYLPENTANE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Base 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)

Reviewed by CIR: Safety Assessment of Isoparaffins as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Names & identifiers

ISOOCTANEINCI아이소옥탄Korean label name (MFDS standard)Pentane, 2,2,4-trimethyl-Synonym

CAS No.chemical registry number: 26635-64-3
CAS No.chemical registry number: 540-84-1
EC No.EU chemical inventory number: 208-759-1
EC No.EU chemical inventory number: 247-861-1
DTXSIDUS EPA chemical ID: DTXSID7024370
DTXCIDUS EPA compound ID: DTXCID104370

IUPAC: 2,2,4-Trimethylpentane
Molecular formula: C8H18
Molecular weight: 114.232 g/mol

Measured properties

Appearance: liquid
Colour: colourless
Melting/freezing point: -107 ℃
Initial boiling point and range: 99 ℃
Flash point: 4.5 ℃
Upper/lower flammability or explosive limits: 6.0 / 1.1 %
Water solubility: 100 ㎎/ℓ(at 20℃)
Vapour density: 3.9
Relative density: 0.69 (at 20℃)
n-Octanol/water partition coefficient (Kow): 4.5
Auto-ignition temperature: 417 ℃(at 1013hPa)
Molecular weight: 114.23

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 16 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.

Fuel4
Intermediate3
Monomers2
Density modifier2
Solvent2
Propellants, non-motive (blowing agents)2
Filler1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 2 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 5 studies

Skin Irrit. 2
Skin Irritation · Authoritative
Severe Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to EPA OPPTS 870.2500 (Acute Dermal Irritation) equivalent or similar to
Category 6.3B (Category 3)
Skin Irritation · Read Across
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to EPA OPPTS 870.2400 (Acute Eye Irritation) equivalent or similar to
Category 6.4A (Category 2A)
Eye Irritation · Read Across