C21H26Cl2N8
461.4 g/mol
Dye & PigmentWarning
Bismarck Brown R
CAS5421-66-9EC226-541-4
Category
Dye & Pigment
Compound Class
Amine
Primary Use
Basic dye for textile coloring
Bismarck Brown R is a basic dye used primarily for coloring textiles. It is a diazenyl-substituted diamine compound, typically supplied as a dihydrochloride salt.
Textile coloring
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
2-(4-(dibutylamino)-2-hydroxybenzoyl)benzoic acid
CAS54574-82-2
Intermediates for thermal and pressure sensitive dyes
ReferenceSame Category
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate
CAS5460-09-3
Dye intermediate for azo dyes
ReferenceSame Category
Pigment Yellow 14
CAS5468-75-7
Organic pigment for plastics and inks
ReferenceSame Category
Crystal violet
CAS548-62-9
Biological stain and dye
Referencesame scaffold
Bismark brown Y
CAS10114-58-6
histological dye and stain
Safety Reference
Warning
H312Harmful in contact with skin
H315Causes skin irritation
H351Suspected of causing cancer
Customs Tariff Classification
The international HS code for Bismarck Brown R (CAS 5421-66-9) is 2927.00.
HS code (international, 6-digit)
2927.00
EU CN code (8-digit)
2927 00 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-[[3-[(2,4-diamino-5-methylphenyl)diazenyl]-4-methylphenyl]diazenyl]-6-methylbenzene-1,3-diamine;dihydrochloride
InChIKey
WLKAMFOFXYCYDK-UHFFFAOYSA-N
SMILES
CC1=C(C=C(C=C1)N=NC2=C(C=C(C(=C2)C)N)N)N=NC3=C(C=C(C(=C3)C)N)N.Cl.Cl
Synonyms (30)
- Astra Vesuvine B
- BISMARK BROWN 53
- Basic Brown 2K
- Basic Brown 4
- Bismarck Brown Base
- Bismarck Brown R
- Bismarck Brown RLNS
- Bismarck Brown TSS
- Bismark Brown (C.I. 21010)
- Bismark Brown R
- Bismark Brown Rfor Microscopy
- C.I. BASIC BROWN 4
- C.I. Basic Brown 4 (8CI)
- C.I.Basic Brown 5
- LOWACRYL BROWN 4
- Vesuvine
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