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5,6-Dihydroxyindole
Danger
GHS07 GHS05 GHS09
NOAEL Data
REACH Registered
Cosmetic Ingredient
5,6-Dihydroxyindole
Also known as: UNII-Z3OC8499KG, Dopamine lutine
CAS 3131-52-0
5,6-Dihydroxyindole (CAS 3131-52-0) is a chemical substance with GHS signal word Danger; key hazard signal: H302; H318; H411. Key regulatory status: REACH registered, 1 regulatory/inventory list, cosmetic ingredient cross-reference; source data from ECHA CLP, EPA ToxValDB, EPA CPDat, SCCS, ECHA REACH.
View cosmetic safety profile for DIHYDROXYINDOLE →
Cross-Vertical Regulatory Divergence
5,6-Dihydroxyindole is prohibited in EU cosmetics at max Annex III/207 but has active industrial GHS classifications (H302, H318, H411).
SOURCE
Cross-vertical comparison
Cosmetics: ingredients.eu_status/eu_max; Chemicals: eu_clp_annex_vi.signal_word/hazard_statement_code
SOURCE
noael studies public
NOAEL studies
81
SOURCE
chemical inventory jurisdictions
Regulatory lists
1
SOURCE
eu clp annex vi
GHS signal
Danger
Chemical Identity
CAS, identifiers, formula, and alternate names for the matched substance record.
SOURCE
DSSTox identifiers
8 fields
InChI Key
SGNZYJXNUURYCH-UHFFFAOYSA-N
Monoisotopic Mass
149.047678
Synonyms
UNII-Z3OC8499KG Dopamine lutine
GHS / CLP Classification
EU harmonized hazard classification, hazard statements, pictograms, and signal word.
SOURCE
EU CLP Annex VI (ECHA)
1 classifications
Hazard Class H-Statements Pictograms Signal
Acute Tox. 4 *; Eye Dam. 1; Aquatic Chronic 2 H302; H318; H411 GHS07; GHS05; GHS09 Danger
Functional Uses
Industrial and product-use categories associated with this substance.
SOURCE
EPA CPDat
2 records
Dye
Regulatory Lists
Inventory, screening, and regulatory list matches from public chemical databases.
SOURCE
EPA CPDat
1 records
List Keyword Source
Europe; Personal care; restricted European Commission CosIng
NOAEL Studies
Toxicology endpoints rendered from public NOAEL study rows.
SOURCE
NOAEL studies
Showing 50 of 81 studies
Value Unit Endpoint Route Species Source
1.5 mg/kg bw/d - - - UnifiedCodex:SCCS_SHADOW:beta.noael_studies
1.5 mg/kg bw/d - - - UnifiedCodex:SCCS_SHADOW:beta.noael_studies
3 mg/kg/day - - rat UnifiedCodex:SCCNFP:beta.noael_studies
3 mg/kg/day - - rat UnifiedCodex:SCCNFP:beta.noael_studies
3 mg/kg - oral rat UnifiedCodex:SCCNFP:beta.noael_studies
3 mg/kg bw/day - - rat UnifiedCodex:SCCS_SHADOW:beta.noael_studies
10 mg/kg bw/day - oral rat UnifiedCodex:SCCNFP:beta.noael_studies
10 mg/kg bw/day - - rat UnifiedCodex:SCCS_SHADOW:beta.noael_studies
Z3OC8499KG UNII FDA UNII substance identifier - - openFDA substances
Z3OC8499KG UNII FDA UNII substance identifier - - openFDA substances
Z3OC8499KG UNII FDA UNII substance identifier - - openFDA substances
Z3OC8499KG UNII FDA UNII substance identifier - - openFDA substances
10 mg/kg bw/day LOAEL oral rat COSMOS_DB
=0.012 mg/kg NOAEL dermal rat SCCS_vision_codex
=0.012 mg/kg NOAEL dermal rat SCCS_vision_codex
=0.012 mg/kg NOAEL dermal rat SCCS_vision_codex
=0.012 mg/kg NOAEL dermal rat SCCS_vision_codex
=1.5 mg/kg bw/d NOAEL - - SCCS_vision_codex
=1.5 mg/kg NOAEL dermal rat SCCS_vision_codex
=1.5 mg/kg bw/d NOAEL - - SCCS_vision_codex
=1.5 mg/kg NOAEL dermal rat SCCS_vision_codex
=1.5 mg/kg bw/d NOAEL - - SCCS_vision_codex
=1.5 mg/kg NOAEL dermal rat SCCS_vision_codex
=1.5 mg/kg bw/d NOAEL - - SCCS_vision_codex
=1.5 mg/kg NOAEL dermal rat SCCS_vision_codex
3 mg/kg bw/day NOAEL oral rat COSMOS_DB
=3 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=3 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=3 mg/kg NOAEL oral rat SCCNFP_vision_codex
=3 mg/kg/day NOAEL - rat SCCNFP_vision_codex
=3 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=3 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=3 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=3 mg/kg NOAEL oral rat SCCNFP_vision_codex
=3 mg/kg/day NOAEL - rat SCCNFP_vision_codex
=3 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=3 mg/kg NOAEL oral rat SCCNFP_vision_codex
=3 mg/kg/day NOAEL - rat SCCNFP_vision_codex
=3 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=3 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=3 mg/kg NOAEL oral rat SCCNFP_vision_codex
=3 mg/kg/day NOAEL - rat SCCNFP_vision_codex
=10 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=10 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=10 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=10 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=10 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=10 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
=10 mg/kg bw/day NOAEL - rat SCCS_vision_codex
=10 mg/kg bw/day NOAEL dermal rat SCCNFP_vision_codex
Showing 50 of 81 studies
REACH Registration
Registration status from the ECHA REACH registered substances database.
SOURCE
ECHA (EU)
1 records
Status Name EC Number Link
Registered 5,6-dihydroxyindole 412-130-9 ECHA overview →
SCCS Opinions
EU Scientific Committee opinions tied to the matched substance.
SOURCE
EU SCCS
1 opinions
Opinion Date Conclusion Max Conc. Concerns
SCCP/0914/05 28 March 2006 insufficient data - insufficient genotoxicity and toxicological data
Frequently Asked Questions
What is the GHS hazard classification for 5,6-Dihydroxyindole?
5,6-Dihydroxyindole (CAS 3131-52-0) is classified under EU CLP Annex VI as Acute Tox. 4 *; Eye Dam. 1; Aquatic Chronic 2 with signal word Danger. Hazard statements: H302; H318; H411. Source: EU CLP Annex VI (ECHA).
What is the NOAEL for 5,6-Dihydroxyindole?
5,6-Dihydroxyindole has 81 NOAEL studies in the database. The lowest reported value is 0.012 mg/kg via dermal in rat. Source: SCCS_vision_codex.
What regulatory lists include 5,6-Dihydroxyindole?
5,6-Dihydroxyindole appears on 1 regulatory/inventory list including Europe; Personal care; restricted. Source: EPA CPDat.
Is 5,6-Dihydroxyindole used in cosmetics?
Yes, 5,6-Dihydroxyindole is also indexed as a cosmetic ingredient under the name DIHYDROXYINDOLE. 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 5,6-Dihydroxyindole come from?
Safety data is sourced from ECHA CLP Annex VI, EPA ToxValDB, EPA CPDat, EPA DSSTox, ECHA REACH, CosIng / Ingredients DB, ChEMBL / DailyMed. All data traces to primary regulatory sources and is updated from official government databases.
Does 5,6-Dihydroxyindole have different safety status in cosmetics vs industrial chemicals?
5,6-Dihydroxyindole is prohibited in EU cosmetics at max Annex III/207 but has active industrial GHS classifications (H302, H318, H411).
Is 5,6-Dihydroxyindole used outside industrial chemicals?
5,6-Dihydroxyindole also appears in cosmetics, pharmaceutical databases.