Royal-blue, water-insol monazo dyes - for fast dyeing polyesters

摘要

Dyes are of formula (I):- (where X is Cl or Br; R1 and R2 are each CH3 or C2H; R3 is CH3 or C2H5). Prepd. by coupling a diazotised 2-cyano-4-nitro-6-chloraniline or -bromaniline with the appropriate substd. anilide coupling component.