Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
Sourcing 4,4'-DINITRO-2,2'-STILBENEDISULFONIC ACID?
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2-(4-Aminophenyl)-6-methyl-1,3-benzothiazole-7-sulfonic acid
Intermediate for azo dyes
Sourcing 4,4'-DINITRO-2,2'-STILBENEDISULFONIC ACID?
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4,4'-Dinitro-2,2'-stilbenedisulfonic acid is an arenesulfonic acid primarily used as an intermediate in the synthesis of azo dyes.
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.
The international HS code for 4,4'-DINITRO-2,2'-STILBENEDISULFONIC ACID (CAS 128-42-7) is 2904.99.
2904.99
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.
5-nitro-2-[(E)-2-(4-nitro-2-sulfophenyl)ethenyl]benzenesulfonic acid
UETHPMGVZHBAFB-OWOJBTEDSA-N
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