C14H10N2O10S2
430.4 g/mol
Dye & PigmentWarning
4,4'-DINITRO-2,2'-STILBENEDISULFONIC ACID
CAS128-42-7EC204-885-6
Category
Dye & Pigment
Compound Class
Organic Acid
Primary Use
Intermediate for azo dyes
4,4'-Dinitro-2,2'-stilbenedisulfonic acid is an arenesulfonic acid primarily used as an intermediate in the synthesis of azo dyes.
Intermediate for yellow azo-azoxy dyes used on cottonIntermediate for orange and red dyes for cellulosic fibersIntermediate for its diamine, which is used in brighteners
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 0.83
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PTCDA
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ReferenceSame Category
D&c green no. 6
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ReferenceSame Category
1-Methylamino-4-bromo anthraquinone
CAS128-93-8
anthraquinone dye intermediate
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for 4,4'-DINITRO-2,2'-STILBENEDISULFONIC ACID (CAS 128-42-7) is 2904.99.
HS code (international, 6-digit)
2904.99
EU CN code (8-digit)
2904 99 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
5-nitro-2-[(E)-2-(4-nitro-2-sulfophenyl)ethenyl]benzenesulfonic acid
InChIKey
UETHPMGVZHBAFB-OWOJBTEDSA-N
SMILES
C1=CC(=C(C=C1[N+](=O)[O-])S(=O)(=O)O)/C=C/C2=C(C=C(C=C2)[N+](=O)[O-])S(=O)(=O)O
Synonyms (30)
- DNDS
- 2, 4,4'-dinitro-
- J6.570F
- Kyselina 4,2'-disulfonova
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