Ingredient Dictionary

BASIC RED 2

Safranin O is an organic chloride salt having 3,7-diamino-2,8-dimethyl-5-phenylphenazin-5-ium as the counterion.

Definition

Safranin O is an organic chloride salt having 3,7-diamino-2,8-dimethyl-5-phenylphenazin-5-ium as the counterion. It is commonly used for staining Gram negative bacteria. It has a role as a fluorochrome and a histological dye. It contains a 3,7-diamino-2,8-dimethyl-5-phenylphenazin-5-ium.

Source: PubChem

US FDA substance register · UNII XTX0YXU2HV · registered name BASIC RED 2 · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Dyes hairHAIR DYEING

Safety & regulatory references

Banned: Argentina · ASEAN · Brazil · China · European Union · South Korea · Taiwan · United Kingdom

Source: ASEAN Cosmetic Directive · EU Cosmetics Regulation · MFDS (Korea) cosmetic regulatory information · Taiwan FDA cosmetic ingredients · UK cosmetics regulations (OPSS)

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

EU Cosmetics Regulation, Annex II (prohibited substances), entry 1322

Source: EU prohibited substances (Annex II)

Restriction II/1322

Source: EU CosIng ingredient list

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name 塩基性赤２: 本品は、次の化学式で表されるフェナジン系の頭髪用色素である。

Source: JCIA labelling names (Japan)

Names & identifiers

BASIC RED 2INCI염기성적색2호Korean label name (MFDS standard)Phenazinium, 3,7-diamino-2,8-dimethyl-5-phenyl-, chlorideSynonym塩基性赤２Japanese labelling name

CAS No.chemical registry number: 477-73-6
EC No.EU chemical inventory number: 207-518-8
DTXSIDUS EPA chemical ID: DTXSID60874047
DTXCIDUS EPA compound ID: DTXCID201012181

IUPAC: 3,7-Diamino-2,8-dimethyl-5-phenylphenazin-5-ium chloride
Molecular formula: C20H19ClN4
Molecular weight: 350.85 g/mol

Measured properties

Appearance: solid
Water solubility: (50 g/L at 20 ℃)
Relative density: 1.447 (at 22 ℃)
Decomposition temperature: 150-160 ℃
Molecular weight: 350.85

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: KOSHA safety data sheets (Korea)

What products actually use it for

What the 1 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Dye1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

1 skin studies and 1 eye studies are on record.

Classed as moderate1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 2 studies

Category 6.3A (Category 2)
Skin Irritation · Read Across
Category 6.4A (Category 2A)
Eye Irritation · Read Across