Sourcing 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
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Chromotropic acid
Azo dye intermediate
Sourcing 4-((4-aminophenyl)diazenyl)benzenesulfonic acid?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
This compound is an azo dye intermediate used in the synthesis of dyes and pigments. It contains an amino group and a sulfonic acid group, contributing to its reactivity and solubility in aqueous systems.
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-aminophenyl)diazenyl)benzenesulfonic acid (CAS 104-23-4) is 2927.00.
2927.00
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.
4-[(4-aminophenyl)diazenyl]benzenesulfonic acid
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