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Data: Fair

Isobutane

  • This ingredient’s score is higher if used in products intended for use around the eyes due to increased risk of absorption.
  • Products with this ingredient are allowed for use in EWG VERIFIED but must meet use restrictions and warnings based on EWG review of company data.
  • This ingredient’s score is higher if used in products that are inhalable (e.g., sprays, powders) because of respiratory concerns.
  • Products with the EWG VERIFIED mark have met the program’s impurity and use restrictions based on EWG's review of the company's data.

IMAGE SOURCE: PubChem

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Other Concerns

Use restrictions (moderate), Non-reproductive organ system toxicity (moderate), Multiple, additive exposure sources (low), Irritation (skin, eyes, or lungs) (moderate), and Contamination concerns (high)

SYNONYMS

● 1,1-DIMETHYLETHANE
● 2-METHYL- PROPANE
● 2-METHYLPROPANE
● ISOBUTANE
● PROPANE, 2-METHYL-
● PROPANE, 2METHYL
● TRIMETHYLMETHANE

Restricted

Restricted: EWG VERIFIED products cannot contain this ingredient without adequate substantiation


isobutane is a hydrocarbon gas; used as a propellant in aerosolized products.

Common concerns

See how this product scores for common concerns.

  • LOW
    Cancer
  • MODERATE
    Allergies & Immunotoxicity
  • LOW
    Developmental and Reproductive Toxicity
  • MODERATE
    Use Restrictions

Ingredient concerns

  • CONCERNS
  • DATA SOURCES

Products with this Ingredient

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shampoo170 products
foundation87 products
styling mousse/foam71 products
recreational sunscreen66 products
shaving cream60 products
antiperspirant/deodorant59 products
body spray46 products
hair spray45 products
antiperspirant/deodorant (men's)39 products
shaving cream (men's)37 products
hair color and bleaching29 products
concealer22 products
hair styling aide20 products
hair treatment/serum18 products
hair-loss treatment15 products
eye shadow13 products
baby sunscreen10 products
conditioner9 products
sunless tanning5 products
facial moisturizer/treatment4 products
BB cream4 products
glitter4 products
body wash/cleanser4 products
tanning oil3 products
3 products
styling gel/lotion3 products
beard care2 products
setting powder/spray2 products
moisturizer2 products
fragrance for men2 products
nail glue1 products
facial cleanser1 products
hand sanitizer1 products
body powder1 products
bubble bath1 products
mouthwash1 products
foot odor control1 products
anti-aging1 products

Contamination concerns

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Chemical
BUTADIENE

Organ system toxicity (non-reproductive)

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CONCERN REFERENCE
Classified as a high human health priorityEnvironment Canada Domestic Substance List
Classified as expected to be toxic or harmfulEnvironment Canada Domestic Substance List

Allergies/immunotoxicity

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CONCERN REFERENCE
Human any toxicant or allergen - strong evidenceCosmetic Ingredient Review Assessments

Irritation (skin, eyes, or lungs)

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CONCERN REFERENCE
Human any irritant - strong evidenceCosmetic Ingredient Review Assessments

Use restrictions

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CONCERN REFERENCE
Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - Use is restricted in Canadian cosmeticsCanada - Prohibited and Restricted Cosmetics Ingredients

Multiple, additive exposure sources

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CONCERN REFERENCE
Used in food or as an additive with limited or no toxicity information availableFDA Everything Added to Food
Designated as safe for general or specific, limited use in foodCosmetic Ingredient Review Assessments
Designated as safe for general or specific, limited use in foodFDA Food Additive Status

Data gaps

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CONCERN REFERENCE
Risk assessment method deficiencies and data gaps - Maximum reported "as used" concentration is basis of safety assessment by industry safety panel (Cosmetic Ingredient Review, CIR) - implicit safe concentration limit in productCosmetic Ingredient Review Assessments
470 studies in PubMed science library may include information on the toxicity of this chemicalNLM PubMed

Miscellaneous

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CONCERN REFERENCE
Occupational hazards related to handlingCPS&Q - Classification & Labelling

Ecotoxicology

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CONCERN REFERENCE
Not suspected to be an environmental toxinEnvironment Canada Domestic Substance List

Persistence and bioaccumulation

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CONCERN REFERENCE
Not suspected to be bioaccumulativeEnvironment Canada Domestic Substance List

Informational

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CONCERN REFERENCE
Industry or government recommendations for safe use: restrictions on concentration, impurities, product types, or manufacturing methods - anyCosmetic Ingredient Review Assessments
  • EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
  • CIR (Cosmetic Ingredient Review). 2006. CIR Compendium, containing abstracts, discussions, and conclusions of CIR cosmetic ingredient safety assessments. Washington DC.
  • Health Canada. 2007. List of Prohibited and Restricted Cosmetic Ingredients. Canada's Cosmetic Ingredient Hotlist. March 2007.
  • FDA (U.S. Food and Drug Administration). 2008. EAFUS [Everything Added to Food]: A Food Additive Database. FDA Office of Food Safety and Applied Nutrition.
  • FDA (U.S. Food and Drug Administration) 2006. Food Additive Status List. Downloaded from http://www.cfsan.fda.gov/%7Edms/opa-appa.html, Oct 16, 2006.
  • NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.
  • CPS&Q (Consumer Products Safety & Quality) formely known as ECB (European Chemicals Bureau). 2008. Classification and Labelling: Chemicals: Annex VI of Directive 67/548/EEC through the 31st ATP.

Understanding scores

Cosmetics and personal care products are not required to be tested for safety before being allowed on the market. The Skin Deep® scoring system was designed to help the public understand whether a product is safe to use or whether it contains ingredients of concern.

Every product and ingredient in Skin Deep gets a two-part score – one for hazard and one for data availability. The safest products score well by both measures, with a low hazard rating and a fair or better data availability rating.

HOW WE DETERMINE SCORES

Hazard score

The Skin Deep ingredient hazard score, from 1 to 10, reflects known and suspected hazards linked to the ingredients. The EWG VERIFIED® mark means a product meets EWG’s strictest criteria for transparency and health.

Score legend

Data availability

The Skin Deep data availability rating reflects the number of scientific studies about the product or ingredient in the published scientific literature.

NONE LIMITED FAIR GOOD ROBUST
Low Availability
Moderate Availability
High Availability

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September 23, 2023 | Los Angeles, CA

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