Isopentane is an alkane that is butane substituted by a methyl group at position 2.
How much products actually contain
No product states its amount yet.
Of the products containing it, 10 list it before the 1% line and 0 after it (usually 1% or less).
Products using this ingredient
10 of 10 confirmed · likeliest to carry enough first
GilletteGillette Labs Shaving Gel 198ml
NIVEANIVEA MEN Sensitive Shaving Gel 200ml
Harry'sHarry's Shave Gel
OribeOribe The Cleanse Clarifying Shampoo
AYUNCHERebalancing Sparkling Essence
NIVEANIVEA MEN Fresh Kick Shaving Gel 200ml
CliniqueClinique For Men Aloe Shave Gel 125ml
R+CoR+Co ANALOG Cleansing Foam Conditioner
Paul MitchellPaul Mitchell Foaming Pomade
WISELYShaving Gel
Definition
Isopentane is an alkane that is butane substituted by a methyl group at position 2. It has a role as a refrigerant.
Source: PubChem
US FDA substance register · UNII ZH67814I0O · registered name ISOPENTANE · single chemical substance
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
Reviewed by CIR: Isobutane, Butane, Isopentane and Propane
Reviewed by CIR: Annual Review of Cosmetic Ingredient Safety Assessments - 2002/2003
Reviewed by CIR: Final Report of the Safety Assessment of Isobutane, Isopentane, n-Butane, and Propane
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name イソペンタン: 本品は、次の化学式で表される炭化水素である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 78-78-4
- EC No.EU chemical inventory number
- 201-142-8
- DTXSIDUS EPA chemical ID
- DTXSID8025468
- DTXCIDUS EPA compound ID
- DTXCID305468
- IUPAC
- 2-Methylbutane
- Molecular formula
- C5H12
- Molecular weight
- 72.151 g/mol
Measured properties
- Appearance
- liquid
- Colour
- colourless
- Melting/freezing point
- -160 ℃
- Initial boiling point and range
- 28 ℃
- Flash point
- &, lt, -51 ℃ (C.C.)
- Upper/lower flammability or explosive limits
- 7.6 / 1.4 %
- Vapour pressure
- 79 ㎪ (20℃)
- Water solubility
- 0.0048 g/100㎖ (25℃)
- Vapour density
- 2.5
- Relative density
- 0.6
- n-Octanol/water partition coefficient (Kow)
- 2.3
- Auto-ignition temperature
- 420 ℃
- Molecular weight
- 72.2
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 33 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.
- Propellants, non-motive (blowing agents)11
- Solvent5
- Viscosity modifier3
- Intermediate3
- Fuel3
- Filler2
- Density modifier2
- Processing aids not otherwise specified1
3 other uses
- Insulators1
- Fuel agents1
- Sealant (barrier)1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
4 skin studies and 2 eye studies are on record.
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 6 studies
- Category 6.3B (Category 3)
Skin Irritation · Read Across - Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · equivalent or similar to OECD Guideline 406 (Skin Sensitisation) equivalent or similar to EU Method B.6 (Skin Sensitisation) - Not classified
Skin Sensitization · Screening - Not classified
Skin Irritation · Screening - Category 6.4A (Category 2A)
Eye Irritation · Read Across - Category 2
Eye Irritation · Screening
Source: US EPA CompTox dashboard
Related literature
- A Simple and an Innovative Gas Chromatography Method to Quantify Isopentane in Cosmetic Products · 2015
- Isobutane, Isopentane, Butane, and Propane · 2024
- Complete frozen section margins for cancer of the tongue: part 1: animal experience. · 2010
- Case report on Malassezia infection of palms and fingernails – speculations on cause for therapeutic failure in pityriasis versicolor · 2009
- Burn caused by isopentane and liquefied petroleum gas in an insecticide · 2008
Linked databases 21
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- PubChem
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US Cosmetic Ingredient Review (CIR) 2 3 4
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · Korean · English · Japanese · Chinese