C34H26N10Na2O9S3
860.8 g/mol
Dye & PigmentDanger
Acid Black 234
CAS157577-99-6EC605-104-5
Category
Dye & Pigment
Compound Class
Amine
Primary Use
acid dye for textiles
Acid Black 234 is an anionic azo dye used as an acid dye for textiles, particularly for dyeing wool, silk, and nylon. Its molecular structure features multiple sulfonate groups, which provide water solubility and affinity for protein fibers.
dyeing wooldyeing silkdyeing nylon
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
SimilarStructure SimilarSimilarity 0.82
Acid Black 210
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Azo dye for protein staining
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Direct Black 38
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direct dye for textiles
SimilarStructure SimilarSimilarity 0.76
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Direct dye for textiles
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Acid Green 16
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acid dye for textiles
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Acid Blue 277
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acid dye for textiles
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Acid blue 113
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acid dye for textiles
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Coomassie violet R200
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acid dye for textiles
ReferenceSame Category
Pigment red 48 strontium
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Red pigment for plastics
Safety Reference
Danger
H318Causes serious eye damage
H373May cause damage to organs through prolonged or repeated exposure
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for Acid Black 234 (CAS 157577-99-6) is 3204.12.
HS code (international, 6-digit)
3204.12
EU CN code (8-digit)
3204 12 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
disodium;4-amino-3-[[4-[[4-[(2,4-diaminophenyl)diazenyl]phenyl]sulfonylamino]phenyl]diazenyl]-5-hydroxy-6-phenyldiazenylnaphthalene-2,7-disulfonate
InChIKey
GLNHIAPTFHWQKY-UHFFFAOYSA-L
SMILES
C1=CC=C(C=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)NS(=O)(=O)C5=CC=C(C=C5)N=NC6=C(C=C(C=C6)N)N)N)O.[Na+].[Na+]
Synonyms (7)
- ACID BLACK 234, ACID BLACK BF
- Acid Black 234
- C.I. Acid Black 234
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