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Data: Fair

1 Naphthol

  • This ingredient's score is higher if used in product forms that are inhalable (e.g., sprays, powders) because of respiratory concerns. The score is lower if used in product forms that have lower risk of inhalation (e.g., solids, liquids)
  • 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 intended for use around the mouth due to increased risk of ingestion and absorption. The score is lower if used in products not intended for use around the mouth.
  • This ingredient's score is higher if used in products intended for use on lips due to increased risk of ingestion and absorption. The score is lower if used in products not intended for use on lips.
  • This ingredient's score is higher if used in products that may not meet industry safety guidelines or U.S. and international government requirements. The score will be lower if used in products that meet these safety guidelines and requirements.

IMAGE SOURCE: PubChem

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Other Concerns

Use restrictions (high), Non-reproductive organ system toxicity (low), Irritation (skin, eyes, or lungs) (high), and Occupational hazards (high)

SYNONYMS

● 1-HYDROXYNAPHTHALENE
● 1-HYDROXYNAPTHALENE
● 1-NAPHTHALENOL
● 1-NAPHTHOL
● 1-NAPHTHYL ALCOHOL
● 1NAPHTHALENOL
● ALPHA-NAPHTHOL
● CI 76605
● OXIDATION BASE 33

Restricted - Unaccpetable

The score of this ingredient can vary from Restricted to Unacceptable based on the method of product consumption. For instance, when used in aerosol-based products, this ingredient may pose a risk to respiratory health, leading to a higher score

Click here for more information about ingredient scores


Petroleum-derived ingredient; used in hair color and bleaching products.

Common concerns

See how this product scores for common concerns.

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

Ingredient concerns

  • CONCERNS
  • DATA SOURCES

Products with this Ingredient

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hair color and bleaching115 products
foundation8 products
toners/astringents1 products
hair treatment/serum1 products
mask1 products

Irritation (skin, eyes, or lungs)

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CONCERN REFERENCE
Classified as irritantCPS&Q - Classification & Labelling

Organ system toxicity (non-reproductive)

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CONCERN REFERENCE
Known human lung and skin toxicantCPS&Q - Classification & Labelling
Classified as toxic or harmfulCPS&Q - Classification & Labelling
Classified as not expected to be potentially toxic or harmfulEnvironment Canada Domestic Substance List

Occupational hazards

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

Allergies/immunotoxicity

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CONCERN REFERENCE
Human skin toxicant or allergen - strong evidenceCosmetic Ingredient Review Assessments
Human skin toxicant or allergen - strong evidenceEWG Assessment of Open Scientific Literature

Use restrictions

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CONCERN REFERENCE
Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - anyOpen scientific literature
Recommended restricted in cosmetics - use, concentration, or manufacturing restrictions - Product type restrictions or differences noted in safety assessment by industry panelCosmetic Ingredient Review Assessments
Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - anyCosIng
Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - Use is restricted in Canadian cosmeticsCanada - Prohibited and Restricted Cosmetics Ingredients
Determined safe for use in cosmetics, subject to concentration or use limitations - anyCTFA International Cosmetic Ingredient Dictionary and Handbook

Cancer

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CONCERN REFERENCE
Cancer - limited evidenceCTFA International Cosmetic Ingredient Dictionary and Handbook

Data gaps

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CONCERN REFERENCE
Insufficient data to determine safetyCosmetic Ingredient Review Assessments
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
1425 studies in PubMed science library may include information on the toxicity of this chemicalNLM PubMed

Persistence and bioaccumulation

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CONCERN REFERENCE
Not suspected to be bioaccumulativeEnvironment Canada Domestic Substance List
Not suspected to be persistentEnvironment 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

Ecotoxicology

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CONCERN REFERENCE
Not suspected to be an environmental toxinEnvironment Canada Domestic Substance List
  • 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.
  • CIR (Cosmetic Ingredient Review). 2006. CIR Compendium, containing abstracts, discussions, and conclusions of CIR cosmetic ingredient safety assessments. Washington DC.
  • EWG Assessment of Open Scientific Literature
  • Open scientific/peer reviewed literature
  • European Commission. 2013. Cosing, the European Commission database with information on cosmetic substances and ingredients. Accessed on March 1, 2013 at http://ec.europa.eu/consumers/cosmetics/cosing/ .
  • Health Canada. 2007. List of Prohibited and Restricted Cosmetic Ingredients. Canada's Cosmetic Ingredient Hotlist. March 2007.
  • CTFA (Cosmetic, Toiletry and Fragrance Association). 2006. International Cosmetic Ingredient Dictionary and Handbook, 11th Edition. Color Additive Information. Washington, DC.
  • NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.

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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