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1- Naphthol-4-sulfonic acid is an important intermediate for dyes and photosensitive paper.
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Chemical content of N.W. acid/% ≥
N.W. acid（HPLC）/% ≥
Uses: Azo dye intermediates, used to manufacture in-line copper blue BR and 2R, in-line violet RB, acid red B and acid medium bordeaux B and other dyes.
Packing:50kg wooden drum / iron drum