Neville Winters acid(Huada Chemical Group)
Uses: intermediate of azo dyes.
M. w: 224.17
Annual output: 500t/y.
Packing: 25kg net plastic woven bag
Appearance: light yellow-yellow powder
1- naphthol-4-sulfonic acid: 65% min
1- naphthylamine-4-sulfonic acid (count by 100% 1-naphthol-4-sulfonic acid) : 1.2% max
sulfor dioxide (count by 100% 1-naphthol-4-sulfonic acid) : 0.3% max
(calculated to 100% 1-Naphthol-4-sulfonic acid)
Storage: store in a dark, cool and dry place, do not exceed 5 layers when piling up