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image source: PubChem
Health Concerns of the Ingredient:
Overall Hazard
Developmental &
reproductive toxicity
Allergies & immunotoxicity
Other HIGH concerns: Occupational hazards; Other MODERATE concerns: Organ system toxicity (non-reproductive); Other LOW concerns: Enhanced skin absorption, Data gaps, Ecotoxicology

About THYMOL: Thymol is a substituted phenol.

Function(s): Denaturant; Fragrance Ingredient; HAIR DYEING; MASKING


Use restrictions

Concern Reference
Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - Japan - restricted for use in some types of cosmetics (concentration limit)Japan's Standards for Cosmetics
Determined safe for use in cosmetics, subject to concentration or use limitations - Safe for use in cosmetics with some qualificationsCosmetic Ingredient Review Assessments

Occupational hazards

Concern Reference
Allowed workplace exposures restricted to low dosesEuropean Union - Classification & Labelling

Organ system toxicity (non-reproductive)

Concern Reference
Classified as toxic or harmful (only for products for use around the mouth; products for use on the lips)European Union - Classification & Labelling
Classified as not expected to be potentially toxic or harmfulEnvironment Canada Domestic Substance List


Concern Reference
Wildlife and environmental toxicityEuropean Union - Classification & Labelling
Not suspected to be an environmental toxinEnvironment Canada Domestic Substance List

Enhanced skin absorption

Concern Reference
Penetration enhancerCosmetic Ingredient Review Assessments

Multiple, additive exposure sources

Concern Reference
Designated as safe for general or specific, limited use in foodFDA Everything Added to Food

Persistence and bioaccumulation

Concern Reference
Not suspected to be persistentEnvironment Canada Domestic Substance List
Not suspected to be bioaccumulativeEnvironment Canada Domestic Substance List


Concern Reference
Occupational hazards related to handlingEuropean Union - Classification & Labelling

Data gaps

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
Missing safety data noted by cosmetic industry reviewCosmetic Ingredient Review Assessments
2,207 studies in PubMed science library may include information on the toxicity of this chemical see search results ->NLM PubMed

Data Sources

CIR (Cosmetic Ingredient Review). 2006. CIR Compendium, containing abstracts, discussions, and conclusions of CIR cosmetic ingredient safety assessments. Washington DC.
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.
EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
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.
IFRA (International Fragrance Assocication). 2010. IFRA Fragrance Ingredient List based on 2008 Use Survey. Accessed online 01/04/2010: http://www.ifraorg.org/Home/News/Latest-News/page.aspx/66?xf_itemId=43&xf_selectionDatapartId=25
Japan Ministry of Health, Labour and Welfare. 2006. Standards for Cosmetics. Evaluation and Licensing Division. Pharmaceutical and Food Safety Bureau.
NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.

About the Skin Deep® ratings

EWG provides information on personal care product ingredients from the published scientific literature, to supplement incomplete data available from companies and the government. The ratings below indicate the relative level of concern posed by exposure to the ingredients in this product - not the product itself - compared to other product formulations. The ratings reflect potential health hazards but do not account for the level of exposure or individual susceptibility, factors which determine actual health risks, if any. Learn more | Legal Disclaimer


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