7,7'-小9体育直播下载安装苹果

intermediate

7,7'-(carbonyldiimino)bis(4-hydroxy-2-naphthalenesulfonic acid) disodium salt

c.a.s. no.: 20324-87-2

chemical formula: c21h14o9n2s2na2

molecular weight: 548.461

chemical name:

2-amino naphthylamine-4,8-disulfonic acid

 

 

appearance

grey powder

coupling value

70% or 80% min.

free j acid

3% max.

insoluble in water

1% max.

packing

25 kg woven bag



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