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Rhoduline acid
dye intermediate
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This compound is a disulfonated naphthalene derivative that functions as an intermediate in the synthesis of dyes and pigments. It is identified as this compound and is characterized by multiple aromatic rings and sulfonic acid groups.
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 7,7'-(carbonyldiimino)bis[4-hydroxy-2-naphthalenesulfonic acid] (CAS 134-47-4) is 2924.21.
2924.21
2924 21 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-hydroxy-7-[(5-hydroxy-7-sulfonaphthalen-2-yl)carbamoylamino]naphthalene-2-sulfonic acid
PCGISRHGYLRXSR-UHFFFAOYSA-N
C1=CC2=C(C=C(C=C2C=C1NC(=O)NC3=CC4=CC(=CC(=C4C=C3)O)S(=O)(=O)O)S(=O)(=O)O)O