Fragrance avoidance
No fragrance-linked caution surfaced in the current profile.
This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.
- beauty
- industrial
1,5-Dihydroxynaphthalene
CAS 83-56-7 · 70/100 · High conf.
Dye
Concern score
70/100High concern based on regulatory listings.
Well researched
Why it's flagged
Naphthalene-1,5-diol and its salts is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.
RestrictedEU EC — restricted
The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.
Regulation
Restrictions first, then routine listings from published regulatory sources.
- commercial_presence
- cpdat_category:industrial
- definition_level:complete
- definition_type:primary
- eu_annex:III
- eu_cosmetic_restricted
- ingredient_type:ingredient substance
- occupational_presence
- View source →restricted
EUEC
Annex III of EU Cosmetics Regulation (EC) 1223/2009: substances which cosmetic products must not contain except subject to the restrictions laid down. Product types: a) Hair dye substance in oxidative hair dye products b) Hair dye substance in non-oxidative hair dye products Maximum concentration: b) 1.0% Other conditions: a) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 1.0% Conditions of use and warnings: Hair colourants can cause severe allergic reactions Read and follow instrctions
USEPAcommercial use observedEPA CPDat observed this chemical in 2 composition records across product categories including Laboratory supplies, Raw materials. EPA CPDat classifies this chemical for functional uses including Dye.
- EPA CPDat observed this chemical in 2 composition records across product categories including Laboratory supplies, Raw materials. EPA CPDat classifies this chemical for functional uses including Dye.Source →
USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
- openFDA substance registry classifies this ingredient as chemical.Source →
Evidence
No graded sources yet for 1,5-Dihydroxynaphthalene. We publish evidence only once a source is linked and reviewed — this ingredient is in the catalog, but has not been assessed.
Suitability
Context-specific fit derived from published classifications and the current ingredient evidence profile.
Good fit
Where it appears
Prevalence of 1,5-Dihydroxynaphthalene in our catalog (epa_cpdat).
Products
2
Brands
2
Laboratory suppliesRaw materials
Typical roles
Dye