Reactive Blue 81 is a synthetic dye used for coloring textiles, particularly cellulose fibers like cotton. It forms a stable covalent bond with the fiber, resulting in durable and wash-fast coloration.
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.
Sourcing Reactive Blue 81?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
Procion red MX-5B
reactive dye for textiles
Reactive red 120
Reactive dye for textile coloration
Reactive Orange 14
Reactive dye for textile coloration
Reactive Yellow 17
Reactive dye for textile coloration
Pigment red 48 barium
Pigment for plastics
Bromthymol blue
pH indicator
Bromocresol green
pH indicator dye
C.I. Direct Blue 273
Direct dye for textiles
The international HS code for Reactive Blue 81 (CAS 75030-18-1) 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.
trisodium;6-[(4-anilino-3-sulfonatophenyl)diazenyl]-4-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-5-oxido-7-sulfonaphthalene-2-sulfonate
POWKFPVLIOLDNF-UHFFFAOYSA-K
C1=CC=C(C=C1)NC2=C(C=C(C=C2)N=NC3=C(C4=C(C=C(C=C4C=C3S(=O)(=O)O)S(=O)(=O)[O-])NC5=NC(=NC(=N5)Cl)Cl)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+]
Sourcing Reactive Blue 81?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.