8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine (Pigment Violet 23; CI 51319) when used as a substance in hair dye products

8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine (Pigment Violet 23; CI 51319) when used as a substance in hair dye products is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

Research docs0Claims0Sources3Functioncolorant • DyeIdentifier6358-30-1

Concern score

100/100Critical concern based on regulatory listings.

Well researched

How we scored this

The concern value reflects this ingredient's chemical identity — its hazard profile from the published classifications and regulatory status below — not the safety of a product it appears in. A score near 40 is the baseline for ingredients with no specific signal (water scores 40 by design), so a mid-range value is not a safety verdict.

Concern score 100/100 (critical) · high confidence.

Regional restrictions

EU — banned · Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.

Where it appears

Prevalence of 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine (Pigment Violet 23; CI 51319) when used as a substance in hair dye products in our catalog (epa_cpdat).

Products

Brands

Furniture and furnishingsConstruction and building materialsArts and crafts/office suppliesPersonal careHome maintenanceCleaning and safety

Typical roles

colorantDyePigment

See products using 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine (Pigment Violet 23; CI 51319) when used as a substance in hair dye products →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

Linked research

Primary documents currently linked to this ingredient record.

No linked research documents are attached to this ingredient yet.

Extracted claims

Structured claim signals pulled from linked ingredient research.

No extracted claims are attached to this ingredient yet.

Regulatory status

Published jurisdiction-level classifications and regulatory designations for this ingredient.

banned

Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.

Effective: 2013-05-08View source →

allowed_listed

Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Rinse-off products

Effective: 2026-06-12View source →

EPA

commercial use observed

EPA CPDat observed this chemical in 67 composition records across product categories including Furniture and furnishings, Construction and building materials, Arts and crafts/office supplies. EPA CPDat classifies this chemical for functional uses including Dye, Pigment.