2,7-Naphthalenediol
- CAS
- 582-17-2
- EC
- 2094787
- PubChem CID
- 11397
- Molecular Formula
- C10H8O2
- Molecular Weight
- 160.1700 g/mol
Used as a colorant in hair dyes. Safe when used up to a maximum of 1.0% in non-oxidative products.
What does it do?
Used as a colorant in hair dyes.
Details
A synthetic auxiliary substance used to balance the color tone in permanent hair dyes. Its use is limited because it has the potential to cause itching or redness on the skin. It is recommended that individuals who have previously experienced allergic problems due to hair dye be cautious of this substance.
Benefits
Functions
Restrictions
Where is it found?
Also known as
Function & Use
Hair Dyeing
Regulatory note
- EU 1223/2009 Annex IIIRestricted
Industry GHS notices (PubChem)
These are industry self-reports to ECHA, not our regulatory assessment.
- H302(14.8%)- Harmful if swallowed
- H315(80.2%)- Causes skin irritation
- H317(18.5%)- May cause an allergic skin reaction
- H318(17.3%)- Causes serious eye damage
- H319(80.2%)- Causes serious eye irritation
- H335(79.0%)- May cause respiratory irritation
- H411(16.0%)- Toxic to aquatic life with long lasting effects
What The Sources Say
SCCS (EU Scientific Committee on Consumer Safety)12
EU 1223/2009 Annex III — SCCS opinion: Request for a Re-evaluation of hair dyes listed in Annex III to Directive 76/768/EEC on Cosmetic Products
EU 1223/2009 Annex III — SCCS opinion: Opinion concerning Use of Permanent Hair Dyes and Bladder Cancer - Updated 2004
EU 1223/2009 Annex III — SCCS opinion: Opinion on Personal Use of Hair Dyes and Cancer Risk
EU 1223/2009 Annex III — SCCS opinion: Opinion on the Use of Permanent Hair Dyes and Bladder Cancer Risk
EU 1223/2009 Annex III — SCCS opinion: Assessment Strategies for Hair Dyes
+7 more records.
ToxValDB (EPA Toxicity Value Database)3
EPA ToxValDB skin/eye data — endpoint: Skin Sensitization, classification: SkinSens1. Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.
EPA ToxValDB skin/eye data — endpoint: Eye Irritation, classification: Category 6.4A (Category 2A). Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.
EPA ToxValDB skin/eye data — endpoint: Skin Irritation, classification: Category 6.3A (Category 2). Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.
Scientific References
- 7-NaphthalenediolSCCS — Scientific Committee on Consumer Safety
- Assessment Strategies for Hair DyesSCCS — Scientific Committee on Consumer Safety
- EPA CompTox Chemicals Dashboard — DSSTox identifiers mapped to CAS (2021r1)US EPA, Center for Computational Toxicology and Exposure
- EU CosIng — Cosmetic Ingredient Database full exportEuropean Commission, DG GROW
- Memorandum on Hair Dye Substances and their Skin Sensitising PropertiesSCCS — Scientific Committee on Consumer Safety
- Opinion concerning Use of Permanent Hair Dyes and Bladder Cancer - Updated 2004SCCS — Scientific Committee on Consumer Safety
- Opinion on 2SCCS — Scientific Committee on Consumer Safety
- Opinion on Personal Use of Hair Dyes and Cancer RiskSCCS — Scientific Committee on Consumer Safety
- Opinion on the Use of Permanent Hair Dyes and Bladder Cancer RiskSCCS — Scientific Committee on Consumer Safety
- PubChem — CID-Synonym-filtered bulk + PUG REST propertiesNCBI / National Library of Medicine
- Request for a Re-evaluation of hair dyes listed in Annex III to Directive 76/768/EEC on Cosmetic ProductsSCCS — Scientific Committee on Consumer Safety
- ToxValDB — skin/eyeUS EPA — ToxValDB v97