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8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine

CAS 6358-30-1 · 100/100 · High conf.

Concern score

100/100Critical concern based on regulatory listings.
High confidence

8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine in plain language

What it is

On cosmetic ingredient lists it appears as “CI 51319”.

Also known as CI 51319 · CI 51319 / pigment violet 23 · Pigment violet 23 · dioxazine violet · pigment violet · violet #23

Show all 7 names

violet pigment

What it does

Used in cosmetics as a colourant and a hair dye. CI 51319 is classed chemically as an oxazine colour.

  • Colorant
  • Hair dyeing
  • Colourant
Is it a concern?
Critical concern: no hazard classifications on record. It is banned in EU cosmetics.

Why it's flagged

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.

RestrictedEU EC — banned

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

Restrictions first, then routine listings from published regulatory sources.

  • EU Annex II — prohibited
  • EU Annex IV — permitted colorant
  • EU permitted colorant
  • EU prohibited in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Industrial
  • EUEC

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

    banned
    View source →
  • EUCosIngActive4 entries
    • Cosmetics Regulation annex IV / ref 85.Source →
    • Cosmetics Regulation annex II / ref 1360.Source →
    • CI 51319 is classed chemically as an oxazine colour. It conforms to the formula: Restriction: IV/85 (CI 51319) II/1360 (Pigment Violet 23; CI 51319: when used as a substance in hair dye products)Source →
    • Pigment Violet 23 is classed chemically as an dioxazine colour. It conforms to the formula: Restriction: II/1360 (when used as a substance in hair dye products)Source →
  • EUECallowed_listedAnnex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Rinse-off products
    • Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Rinse-off productsSource →
  • USEPAcommercial use observedEPA 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.
    • 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.Source →

Expert safety opinions

No expert opinion on file for 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

Evidence & sources

No graded research studies for 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

3 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →
  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2013-05-08

    Open →
  • EPA Chemical and Products Database

    exposure · updated november 3, 2016

    Open →

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

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine in a product composition. These are source records, not Greenveil catalog products.

Source records

67

Named organisations

6

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

Typical roles

ColorantHair dyeingColourant
See products using 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine →

Catalog

Found in these products

Cosmetic and personal-care products that list 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine are shown first. Their ingredient lists include 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine; each product's own rating depends on its whole formula, so it is shown on the product page, not here.