1)-Naphthylamine-4-Sulfonate 1>Total amino:75.0%min 2> 1-naphthly-amine: 0.02% max 3> water insoluble matter: 0.1% max We are Dyes manufacture,We produce the Sodium Naphthionate ,and then use it to produce dyes such as Acid red A/B,acid red 3R,direcr red G,Direct red 4BE(Congo red),direct red GB,direct red B,direct green 2GNSodium Naphthionate 4-Amino-1-naphthalenesulfonic acid CAS 130-13-2 %74 ...