Lithium salts, as well as specific amine salts of 1 - (4 - phenylazo phenylazo) - 2 - hydroxy naphthalene - 6,8 - disulfonic

摘要

Diazo dyestuff of the formula IMAGE in which Kat(+) denotes a lithium ion or an ammonium ion of the formula IMAGE in which R1 and R2 independently of one another stand for methyl, ethyl or C2-C3-alkyl which is substituted by hydroxyl and L stands for C2-C3-alkylene, and liquid dyestuff preparations containing water and this diazo dyestuff.