Formazan blue reactive dye
AssigneeSumitomo Chemical Company, Limited
InventorsTakashi Omura, Yasuo Tezuka, Masaki Sunami
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Abstract
A formazan reactive blue dye represented by a free acid of the formula, ##STR1## wherein X.sub.1 and X.sub.2 are each a hydrogen atom, a methyl, methoxy or sulfonic acid group, m and l are each an integer of 0 or 1 and n is an integer of 0 to 2, provided that the sum of m, n and l is 2 or 3. This dye is usable for dyeing cellulose fibers in a brilliant blue color with good fastness, particularly, against chlorine, light and perspiration-light, as well as good white dischargeability.
Claims5
A compound represented by a free acid of the formula, ##STR20## wherein X.sub.1 and X.sub.2 are each hydrogen, methyl or methoxy m and l are each an integer of 0 or 1 and n is an integer of 0 to 2, provided that the sum of m, n and l is 2 or 3.
A compound of the formula, ##STR21##
A compound of the formula, ##STR22##
A compound of the formula, ##STR23##
A compound of the formula, ##STR24##
Dependencies are inferred from the claim text.