To provide a dye that does not use dianisidine, is improved in inferiority of dyeing property and fastness and in lack of heat resistance and clearness, etc., and can dye a cellulosic fiber etc., from more moderate blue to purple with fastness and in high density, thus is an environment-friendly dye for human and the earth in respect of safety and health and in saving resources and protecting the environment from pollution.
The dye is a disazo compound represented by formula (1) or a salt thereof, moreover a copperized compound or a salt thereof. wherein, Ar1 and Ar2 are each independently an aryl group that may have a substituent; X is CO2H, SO3H or PO3H; Y is OH or CO2H; R1 is a hydrogen atom, an alkyl or aryl group that may have a substituent; Q and Z are each a substituent; m is 0-3; and n+o is 0-5.
UTO JUNICHI
NAGATSUKA MASAYA
SASAKI YOSHITAKE
KAKO RYUTARO
KOSHIKAWA EMI
