Is Solvent Red 24 safe in cosmetics?
Solvent Red 24 has a safety rating of "POOR" in our database. EU status: permitted. US status: permitted.
Poor
Cosmetic Ingredient
Solvent Red 24
Also known as: Scarlet Red, 2-Naphthalenol, 1-[2-[2-methyl-4-[2-(2-methylphenyl)diazenyl]phenyl]diazenyl]-, 2-Naphthalenol, 1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-, 2-Naphthol, 1-(4-o-tolylazo-o-tolylazo)-, 1-[2-[2-Methyl-4-[2-(2-methylphenyl)diazenyl]phenyl]diazenyl]-2-naphthalenol (+15 more)
INCI: CI 26105 (SOLVENT RED 24)
Solvent Red 24 (CAS 85-83-6) is a cosmetic cosmetic ingredient functioning as Colorant — oil-soluble azo dye. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 85-83-6 →
Auto-generated CPSR Part A draft with source citations
Function
Colorant — oil-soluble azo dye
Safety Rating
POOR
Chemistry & Identifiers
IUPAC Name
1-[[2-methyl-4-[(2-methylphenyl)diazenyl]phenyl]diazenyl]naphthalen-2-ol
InChIKey
RCTGMCJBQGBLKT-UHFFFAOYSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Delisted (formerly Ext. D\&C Red No. 24, previously permitted for external drugs/cosmetics)
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Solvent Red 24.
Calculate MoS for your specific formulation with the MoS Calculator.
IARC Carcinogenicity
International Agency for Research on Cancer (WHO) monograph evaluation.
IARC Group
3
Volume
8, Sup 7
Evaluation Year
1987
ECHA REACH Registration
European Chemicals Agency REACH dossier and Substances of Very High Concern listing.
Registration Type
Full
Tonnage Band
Ceased manufacture
Substance Type
SUBSTANCE
SVHC Candidate
No
EU CosIng Annex Listing
European Commission CosIng database Annex references per Regulation (EC) No 1223/2009.
Annex II — Prohibited
Ref: 379
(EC) 2009/1223
Expanded Jurisdictional Detail
Additional regulatory detail beyond the 7-jurisdiction summary: Saudi SFDA, Korea MFDS, ASEAN ACD, Japan/Korea, Brazil/India, and cross-jurisdictional restriction entries.
SA Saudi SFDA (II - Prohibited)
ASEAN Cosmetic Directive (II)
Ref: 379
BRIN Brazil/India Cosmetics
Brazil: Prohibited
India: Prohibited (GNRAS)
Additional Jurisdictional Restrictions (6)
| Jurisdiction | Status | Max % | Product Type |
|---|---|---|---|
| IN | banned | - | all cosmetics |
| IN | banned | - | all cosmetics |
| CA | banned | - | - |
| ASEAN | banned | - | All cosmetic products prohibited |
| ASEAN | banned | - | BANNED — listed in Annex II Ref 378 |
| KR | prohibited | - | - |
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Dye
Regulatory List Membership (2)
EU Banned in Cosmetics
EU CosIng Cosmetics Ingredient Database
Expert Verdict
Expert safety assessment and concern-level summary for Solvent Red 24.
Regulatory Flags
colorant
eu_banned_cosmetics
eu_cosing_listed
Known Synonyms
Scarlet Red
2-Naphthalenol, 1-[2-[2-methyl-4-[2-(2-methylphenyl)diazenyl]phenyl]diazenyl]-
2-Naphthalenol, 1-[[2-methyl-4-[(2-methylphenyl)azo]phenyl]azo]-
2-Naphthol, 1-(4-o-tolylazo-o-tolylazo)-
1-[2-[2-Methyl-4-[2-(2-methylphenyl)diazenyl]phenyl]diazenyl]-2-naphthalenol
1-(2-Methyl-4-o-tolylazo-phenylazo)-naphthalen-2-ol
1-(2'-Methyl-4'-(2''-methylphenylazo)phenylazo)-2-naphthol
1-[4-(o-Tolylazo)-o-tolylazo]-2-naphthol
C.I. 26105
o-Tolueneazo-o-toluene-β-naphthol
o-Tolylazo-o-tolylazo-β-naphthol
1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
4-16-00-00249
Biebrich Scarlet R medicinal
Biebrich Scarlet BPC
Biebrich Scarlet Red
Brasilazina Oil Red B
BRN 0709018
Calco Oil Red D
Candle Scarlet B
Chemical Function
Dye
Regulatory Lists
inert_ingredient; non_food_use; Pesticides
banned; Europe; Personal care
Mutation Research/Reviews in Genetic Toxicology
Australian Status
AICIS status: listed
Frequently Asked Questions
Is Solvent Red 24 allowed in the EU?
Solvent Red 24 EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Solvent Red 24 do in cosmetics?
Solvent Red 24 functions as: Colorant — oil-soluble azo dye. It is classified as a cosmetic ingredient in our database. CAS number: 85-83-6.
Is Solvent Red 24 used outside cosmetics?
Solvent Red 24 also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Solvent Red 24 compliance across multiple jurisdictions:
Ingredient Decoder
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82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
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