What is the NOAEL for C.I. Solvent Red 24?
C.I. Solvent Red 24 has 6 NOAEL studies in the database. The lowest reported value is I35E9QU96C UNII. Source: openFDA substances.
NOAEL Data
IARC Group 3
REACH Registered
Cosmetic Ingredient
C.I. 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)
CAS 85-83-6
C.I. Solvent Red 24 (CAS 85-83-6) is a chemical substance; key hazard signal: IARC Group 3. Key regulatory status: REACH registered, 3 regulatory/inventory lists, cosmetic ingredient cross-reference; source data from EPA ToxValDB, EPA CPDat, AICIS, IARC, ECHA REACH.
SOURCE
NOAEL studies
NOAEL studies
6
SOURCE
Chemical inventory jurisdictions
Regulatory lists
3
SOURCE
EU CLP Annex VI
GHS signal
Not classified
Chemical Identity
CAS, identifiers, formula, and alternate names for the matched substance record.
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DSSTox identifiers
26 fields
Name
C.I. Solvent Red 24
CAS Number
85-83-6
DTXSID
DTXSID8041743
Molecular Formula
C24H20N4O
InChI Key
RCTGMCJBQGBLKT-UHFFFAOYSA-N
Monoisotopic Mass
380.163711
Synonyms
Scarlet Red2-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-naphthalenol1-(2-Methyl-4-o-tolylazo-phenylazo)-naphthalen-2-ol1-(2'-Methyl-4'-(2''-methylphenylazo)phenylazo)-2-naphthol1-[4-(o-Tolylazo)-o-tolylazo]-2-naphtholC.I. 26105o-Tolueneazo-o-toluene-β-naphtholo-Tolylazo-o-tolylazo-β-naphthol1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
IARC Carcinogen Classification
Carcinogenic hazard classification from IARC monograph evaluations.
SOURCE
IARC Monographs on the Identification of Carcinogenic Hazards to Humans
1 records
| Group | Meaning | Evaluated | Volume |
|---|---|---|---|
| Group 3 | Not classifiable | 1987 | 8, Sup 7 |
Functional Uses
Industrial and product-use categories associated with this substance.
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EPA CPDat
2 records
Dye
Regulatory Lists
Inventory, screening, and regulatory list matches from public chemical databases.
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EPA CPDat
3 records
| List | Keyword | Source |
|---|---|---|
| inert_ingredient; non_food_use; Pesticides | EPA | CPCat |
| banned; Europe; Personal care | European Commission | CosIng |
| - | Mutation Research/Reviews in Genetic Toxicology | Published Articles |
NOAEL Studies
Toxicology endpoints rendered from public NOAEL study rows.
SOURCE
NOAEL studies
Showing 6 of 6 studies
| Value | Unit | Endpoint | Route | Species | Source |
|---|---|---|---|---|---|
| I35E9QU96C | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| I35E9QU96C | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| I35E9QU96C | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| I35E9QU96C | UNII | FDA UNII substance identifier | - | - | openFDA substances |
| 3 | IARC group | IARC carcinogenicity classification | - | - | IARC Monographs |
| 3 | unitless | IARC group | - | - | NTP ICE cancer |
Showing 6 of 6 studies
REACH Registration
Registration status from the ECHA REACH registered substances database.
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ECHA
1 records
| Status | Name | EC Number | Link |
|---|---|---|---|
| Registered | 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol | 201-635-8 | ECHA overview → |
Australian Status (AICIS)
Australian industrial chemicals inventory status and applicable conditions.
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AICIS inventory
1 records
Inventory Status
listed
Cosmetic Safety Profile
Same-CAS cosmetic ingredient record for cross-vertical context.
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CosIng / Ingredients DB
EU Status
permitted
Max
-
Category
Colorant
Pharmaceutical Data
Same-CAS pharmaceutical records from drug and bioactivity sources.
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ChEMBL / DailyMed
SCARLET RED
ChEMBL Phase
2
Adverse Events
0
Bioactivity
2
Cannabis Data
Same-CAS cannabis compliance and lab records where available.
SOURCE
Cannabis regulatory / lab data
efsa substances
1 cannabis record found in efsa substances.
View full cannabis profile →Frequently Asked Questions
What regulatory lists include C.I. Solvent Red 24?
C.I. Solvent Red 24 appears on 2 regulatory/inventory lists including inert_ingredient; non_food_use; Pesticides, banned; Europe; Personal care. Source: EPA CPDat.
Is C.I. Solvent Red 24 a carcinogen according to IARC?
C.I. Solvent Red 24 is classified by IARC as Group 3 — not classifiable as to its carcinogenicity to humans (evaluated 1987). Source: IARC Monographs on the Identification of Carcinogenic Hazards to Humans.
Is C.I. Solvent Red 24 used in cosmetics?
Yes, C.I. Solvent Red 24 is also indexed as a cosmetic ingredient under the name Solvent Red 24. View the full cosmetic safety profile on the ingredient page for detailed safety data, SCCS opinions, and regulatory status.
Where does the safety data for C.I. Solvent Red 24 come from?
Safety data is sourced from EPA ToxValDB, EPA CPDat, AICIS (Australian Industrial Chemicals Introduction Scheme), EPA DSSTox, IARC Monographs, ECHA REACH, CosIng / Ingredients DB, ChEMBL / DailyMed, cannabis regulatory/lab databases. All data traces to primary regulatory sources and is updated from official government databases.
Is C.I. Solvent Red 24 used outside industrial chemicals?
C.I. Solvent Red 24 also appears in cosmetics, pharmaceutical, cannabis databases.