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CAS 12236-86-1 — Reactive Blue 21

Reactive Blue 21 is a high-performance reactive dye primarily used in textile manufacturing to color cotton, wool, and synthetic fibers with excellent wash and light fastness. It is a blue shade commonly employed in apparel, home textiles, and industrial fabrics where color stability is critical. This chemical has a CAS number of 12236-86-1 and a molecular weight of 1079.6 g/mol. It is stored at ambient conditions and carries no signal word, indicating no acute hazard under normal use. Molekula supplies Reactive Blue 21 from research to bulk quantities with full documentation and ISO 9001:2015 traceability.