Poor Cosmetic Ingredient NOAEL Data

DIHYDROXYINDOLE

CAS Number
3131-52-0
Function
Hair Dyeing
Safety Rating
POOR

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status Prohibited
EU Max Conc. Annex III/207
๐Ÿ‡บ๐Ÿ‡ธ US Status Not specifically regulated

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Toxicological Studies

2 study endpoints found for DIHYDROXYINDOLE. NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
NOAEL 3 mg/kg bw/day oral rat Subchronic COSMOS_DB
LOAEL 10 mg/kg bw/day oral rat Subchronic COSMOS_DB

Expert Verdict

DIHYDROXYINDOLE is listed in the EU CosIng database with functions: Hair Dyeing It is prohibited under EU Cosmetics Regulation (Annex II).

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Concern Level: High

Regulatory Flags

cosing-sourced eu-prohibited needs-enrichment eu_cosing_listed

Frequently Asked Questions

Is DIHYDROXYINDOLE safe in cosmetics?

DIHYDROXYINDOLE is listed in the EU CosIng database with functions: Hair Dyeing It is prohibited under EU Cosmetics Regulation (Annex II). The EU classifies DIHYDROXYINDOLE as "Prohibited". Safety rating: POOR. 2 toxicological study endpoint(s) are available in our database.

Is DIHYDROXYINDOLE allowed in the EU?

DIHYDROXYINDOLE EU regulatory status: Prohibited. Maximum allowed concentration: Annex III/207. This is based on EU Regulation 1223/2009 and its amendments.

What does DIHYDROXYINDOLE do in cosmetics?

DIHYDROXYINDOLE functions as: Hair Dyeing. It is classified as a cosmetic ingredient in our database. CAS number: 3131-52-0.

What is the NOAEL for DIHYDROXYINDOLE?

The NOAEL (No Observed Adverse Effect Level) for DIHYDROXYINDOLE is 3 mg/kg bw/day based on a Subchronic study via oral route in rat. A total of 2 study endpoints are available. Source: COSMOS_DB.

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