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  • industrial

Phenothiazin-5-ium, 3,7-diamino-, chloride (1:1)

CAS 581-64-6

Also registered as 4 other CAS numbers

16178-66-8 · 50815-03-7 · 93211-81-5 · 93930-11-1

Concern score

Not assessed — no hazard data yet.

Phenothiazin-5-ium, 3,7-diamino-, chloride (1:1) in plain language

What it is

Also known as Thionine · 3,7-Diaminophenazathionium chloride · 3,7-Diaminophenothiazin-5-ium chloride · C.I. 52000 · CI-52000 · Katalysin

Show all 12 names

Lauth's violet · 3,7-Diamino-5λ4-phenothiazin-5-ylium chloride · 3,7-Diaminophenothiazin-5-iumchloride · Cyanine · Phenothiazin-5-ium, 3,7-diamino-, chloride · Phenothiazinium, 3,7-diamino-, chloride (1:1)

What it does

Used in consumer products as a colourant.

  • Colourant
Is it a concern?
We haven't assessed a concern score for this ingredient yet.

Regulation

No restrictions found. Phenothiazin-5-ium, 3,7-diamino-, chloride (1:1) appears in these published regulatory listings.

Recorded in these product areas

  • Found in consumer products
  • Industrial
  • USEPAcommercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Pigment, Dye.
    • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Pigment, Dye.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Evidence & sources

No graded research studies for Phenothiazin-5-ium, 3,7-diamino-, chloride (1:1) yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

4 data sources

Where this comes from

  • EPA Chemical and Products Database

    exposure · updated 2014-11-26

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

Suitability

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

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.

Where it has been recorded

How often EPA CPDat has listed Phenothiazin-5-ium, 3,7-diamino-, chloride (1:1) in a product composition. These are source records, not Greenveil catalog products.

Named organisations

2

Typical roles

Colourant
See products using Phenothiazin-5-ium, 3,7-diamino-, chloride (1:1) →