Other ConcernsUse restrictions (moderate)
SYNONYMS2,4-DIHYDRO-5-METHYL-2-PHENYL- 3H-PYRAZOL-3-ONE, 2,4-DIHYDRO-5-METHYL-2-PHENYL-3H-PYRAZOL-3-ONE, 3-METHYL-1-PHENYL-5-PYRAZOLONE, 3H-PYRAZOL-3-ONE, 2,4-DIHYDRO-5-METHYL-2-PHENYL-, 3HPYRAZOL3ONE, 2,4DIHYDRO5METHYL2PHENYL, DEVELOPER 1, NORPHENAZONE, and PHENYL METHYL PYRAZOLONE
Unacceptable: EWG VERIFIED products cannot contain this ingredient
Ingredient used in hair color and bleaching products.
See how this product scores for common concerns.
MODERATEAllergies & Immunotoxicity
LOWDevelopmental and Reproductive Toxicity
- DATA SOURCES
Products with this Ingredient
|hair color and bleaching||20 products|
|Human skin toxicant or allergen - strong evidence||Cosmetic Ingredient Review Assessments|
|Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - any||CosIng|
|Restricted in cosmetics (recommendations or requirements) - use, concentration, or manufacturing restrictions - any||Open scientific literature|
|Determined safe for use in cosmetics, subject to concentration or use limitations - any||CTFA International Cosmetic Ingredient Dictionary and Handbook|
|Cancer - limited evidence||CTFA International Cosmetic Ingredient Dictionary and Handbook|
|Insufficient data to determine safety||Cosmetic 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 product||Cosmetic Ingredient Review Assessments|
|785 studies in PubMed science library may include information on the toxicity of this chemical||NLM PubMed|
|Not suspected to be an environmental toxin||Environment Canada Domestic Substance List|
Organ system toxicity (non-reproductive)
|Classified as not expected to be potentially toxic or harmful||Environment Canada Domestic Substance List|
Persistence and bioaccumulation
|Not suspected to be persistent||Environment Canada Domestic Substance List|
|Not suspected to be bioaccumulative||Environment Canada Domestic Substance List|
|Industry or government recommendations for safe use: restrictions on concentration, impurities, product types, or manufacturing methods - any||Cosmetic Ingredient Review Assessments|
- CIR (Cosmetic Ingredient Review). 2006. CIR Compendium, containing abstracts, discussions, and conclusions of CIR cosmetic ingredient safety assessments. Washington DC.
- 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/ .
- Open scientific/peer reviewed literature
- 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.
- EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
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
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.
The Skin Deep data availability rating reflects the number of scientific studies about the product or ingredient in the published scientific literature.