Ingredient Dictionary

CI 42051

C.I. Acid Blue 3 is a diarylmethane.

Definition

C.I. Acid Blue 3 is a diarylmethane.

Source: PubChem

US FDA substance register · UNII 8QE473DV1Z · registered name PATENT BLUE V · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

CI 42051 is classed chemically as a triphenylmethane colour. It conforms to the formula:

Cosmetic roles

Dyes hairHAIR DYEINGAdds colourCOLORANT

Safety & regulatory references

Banned: Argentina · ASEAN · Brazil · European Union · United Kingdom
Restricted or banned: Argentina · ASEAN · Brazil · China · European Union · Taiwan
Allowed colourant: ASEAN · Taiwan

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

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 1356

Source: EU prohibited substances (Annex II)

EU Cosmetics Regulation, Annex IV (allowed colourants), entry 60

Source: EU allowed colourants (Annex IV)

Restriction II/1356 (Acid Blue 3; CI 42051: when used as a substance in hair dye products)

Source: EU CosIng ingredient list

Restriction IV/60 (CI 42051) II/1356 (Acid Blue 3; CI 42051: when used as a substance in hair dye products)

Source: EU CosIng ingredient list

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

Official labels & definitions

JCIA labelling name 酸性青３: 本品は、次の化学式で表されるトリフェニルメタン系の頭髪用色素である。

Source: JCIA labelling names (Japan)

Names & identifiers

CI 42051INCI산성청색3호Korean label name (MFDS standard)Ethanaminium, N-[4-[[4-(diethylamino)phenyl](5-hydroxy-2,4-disulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-, hydroxide, inner salt, calcium salt (2:1)SynonymACID BLUE 3Synonym

CAS No.chemical registry number: 3536-49-0
EC No.EU chemical inventory number: 222-573-8
DTXSIDUS EPA chemical ID: DTXSID00873918
DTXCIDUS EPA compound ID: DTXCID801012103

IUPAC: Calcium bis(4-{[4-(diethylamino)phenyl][4-(diethyliminio)cyclohexa-2,5-dien-1-ylidene]methyl}-6-hydroxybenzene-1,3-disulfonate)
Molecular formula: C54H62CaN4O14S4
Molecular weight: 1159.42 g/mol

Measured properties

Appearance: Dark blue powder or granules · powder
Colour: Greenish blue
Melting/freezing point: 200 ℃
Molecular weight: 1159.52

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: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 24 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.

Dye24

Source: US EPA CompTox dashboard