Direct black dye

Details Direct black dye Direct black dye

C - Chemistry, Metallurgy

09

B

260/159, 8/25.2

C09B 33/22 (2006.01) C09B 31/18 (2006.01) D06P 1/04 (2006.01) D21H 21/28 (2006.01)

Patent

CA 1122205

ABSTRACT A tri- or tetrasulfonic acid compound having the structure Image where A is or Image Image where R1 is H, SO3M, lower alkyl, lower alkoxy, halogen, COOM, NHCO lower alkyl, NHCOCOOM, NO2 or CN and R2 is H, SO3M, lower alkyl, lower alkoxy, halogen or COOM; B is Image or Image wherein R3 is H, lower alkyl or lower alkoxy; R4 is H, lower alkyl, lower alkoxy or NHCO lower alkyl; R5 is H, or SO3M; R6 is H, or lower alkyl and M is H, Na, K, Li, NH4 or a mono, di or trialkanol amine. The compounds of this invention are water-soluble and are useful as direct dyes for cellulosic textiles, paper and leather; imparting a black coloration thereto.

348585

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