发明授权
US5470959A Polyazo dyes having a diazo component of the aminobenzophenone series 失效
具有氨基二苯甲酮系列的重氮组分的多偶氮染料

Polyazo dyes having a diazo component of the aminobenzophenone series
摘要:
##STR1## where p is from 1 to 2 and q is from 0 to 1 are useful in free form or as copper, chromium, iron, cobalt or nickel complexes for dyeing leather.
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