# 1,5-Dihydroxynaphthalene

URL: https://app.greenveil.ai/ingredients/ingredient_cas_83_56_7
Categories: beauty, industrial
Functions: Dye
Identifier: 83-56-7

> 1,5-Dihydroxynaphthalene is used as dye. Greenveil chemical-concern score: 70/100 — High concern based on regulatory listings.. Assessed from 6 sources.

## Safety assessment

- Chemical concern score: 70/100 — High concern based on regulatory listings.
- Confidence: 4
- Rationale: Naphthalene-1,5-diol and its salts is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.

## Regulatory status

- EU: restricted — 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
- US: commercial use observed — 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.
- US: listed in openFDA substance — openFDA substance registry classifies this ingredient as chemical.

_Assessed by Greenveil._