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Data: Fair

Thymol

  • This ingredient’s score is higher if used in products intended for use around mouth due to increased risk of ingestion and absorption.
  • This ingredient’s score is higher if used in products intended for use on lips due to increased risk of ingestion and absorption.
  • Products with the EWG VERIFIED mark have met use restrictions and warnings based on EWG review of company data.

IMAGE SOURCE: PubChem

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Other Concerns

Enhanced skin absorption, Use restrictions (moderate), Non-reproductive organ system toxicity (low), Ecotoxicology (low), and Occupational hazards (high)

SYNONYMS

2-HYDROXY-1-ISOPROPYL-4-METHYLBENZENE, 3-HYDROXY-P-CYMENE, 5-METHYL-2-(1-METHYLETHYL)- PHENOL, 5-METHYL-2-(1-METHYLETHYL)PHENOL, PHENOL, 5-METHYL-2-(1-METHYLETHYL)-, PHENOL, 5METHYL2(1METHYLETHYL), and THYMOL

Thymol is a substituted phenol.

Common concerns

See how this product scores for common concerns.

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

Ingredient concerns

  • CONCERNS
  • DATA SOURCES

Products with this Ingredient

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mouthwash64 products
body powder8 products
bath oil/salts/soak4 products
diaper cream1 products
facial cleanser1 products
body wash/cleanser1 products
liquid hand soap1 products
1 products
nail treatment1 products

Enhanced skin absorption

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CONCERN REFERENCE
Penetration enhancerCosmetic Ingredient Review Assessments

Occupational hazards

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CONCERN REFERENCE
Allowed workplace exposures restricted to low dosesCPS&Q - Classification & Labelling

Use restrictions

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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

Organ system toxicity (non-reproductive)

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CONCERN REFERENCE
Classified as toxic or harmfulCPS&Q - Classification & Labelling
Classified as not expected to be potentially toxic or harmfulEnvironment Canada Domestic Substance List

Ecotoxicology

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CONCERN REFERENCE
Wildlife and environmental toxicityCPS&Q - Classification & Labelling
Not suspected to be an environmental toxinEnvironment Canada Domestic Substance List

Miscellaneous

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

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
Missing safety data noted by cosmetic industry reviewCosmetic Ingredient Review Assessments
2207 studies in PubMed science library may include information on the toxicity of this chemicalNLM PubMed

Multiple, additive exposure sources

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

Persistence and bioaccumulation

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CONCERN REFERENCE
Not suspected to be persistentEnvironment Canada Domestic Substance List
Not suspected to be bioaccumulativeEnvironment Canada Domestic Substance List
  • 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.
  • Japan Ministry of Health, Labour and Welfare. 2006. Standards for Cosmetics. Evaluation and Licensing Division. Pharmaceutical and Food Safety Bureau.
  • EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
  • NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.
  • 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.

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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