Safety Reference
Warning
H319Causes serious eye irritation
Sourcing Reactive Blue 4?
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Pigment Yellow 34
Yellow pigment for paints and plastics
Sourcing Reactive Blue 4?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Reactive Blue 4 is a synthetic dye primarily used in textile dyeing. It is also employed as a ligand in affinity chromatography for protein purification, based on its ability to bind to certain protein active sites.
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 Reactive Blue 4 (CAS 13324-20-4) is 3204.16.
3204.16
3204 16 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
1-amino-4-[3-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-sulfoanilino]-9,10-dioxoanthracene-2-sulfonic acid
RTLULCVBFCRQKI-UHFFFAOYSA-N
C1=CC=C2C(=C1)C(=O)C3=C(C2=O)C(=C(C=C3NC4=CC(=C(C=C4)S(=O)(=O)O)NC5=NC(=NC(=N5)Cl)Cl)S(=O)(=O)O)N