C44H32N13Na3O11S3
1084 g/mol
Dye & PigmentWarning
Direct black 22
CAS6473-13-8EC229-326-3
Category
Dye & Pigment
Compound Class
Other
Primary Use
Direct dye for textiles
Direct black 22 is a direct dye primarily used in the textile industry for coloring materials such as cotton and rayon. It features a complex aromatic structure with multiple sulfonate groups, enhancing its water solubility and affinity for cellulose fibers.
Dye for textilesColoring agent for cotton and rayon
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 0.80
C.I. Direct Black 32
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Direct dye for textiles
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ReferenceSame Category
2-[(E)-(4-Chloro-2-nitrophényl)diazényl]-N-(2-chlorophényl)-3-oxobutanamide
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yellow pigment for industrial use
ReferenceSame Category
2-[(E)-(4-Methoxy-2-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide
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Pigment for inks and coatings
ReferenceSame Category
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Pigment for plastics and inks
Safety Reference
Warning
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for Direct black 22 (CAS 6473-13-8) is 3204.14.
HS code (international, 6-digit)
3204.14
EU CN code (8-digit)
3204 14 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
trisodium;6-[(2,4-diaminophenyl)diazenyl]-3-[[4-[4-[[7-[(2,4-diaminophenyl)diazenyl]-1-hydroxy-3-sulfonatonaphthalen-2-yl]diazenyl]-2-sulfonatoanilino]phenyl]diazenyl]-4-hydroxynaphthalene-2-sulfonate
InChIKey
QTFHTNFVUCUDIR-UHFFFAOYSA-K
SMILES
C1=CC(=CC=C1NC2=C(C=C(C=C2)N=NC3=C(C=C4C=CC(=CC4=C3O)N=NC5=C(C=C(C=C5)N)N)S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC6=C(C=C7C=CC(=CC7=C6O)N=NC8=C(C=C(C=C8)N)N)S(=O)(=O)[O-].[Na+].[Na+].[Na+]
Synonyms (12)
- C.I. DIRECT BLACK 22
- Direct Black 22, tech.
- Direct black 22
- Formal Fast Black B
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