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 2GN

Sodium Naphthionate 4-Amino-1-naphthalenesulfonic acid CAS 130-13-2 %74 min1, Best quality & competitive price2, ISO 9001-2008 cerificate manufacture3, We are the dyes manufacture 

4-Amino-1-naphthalenesulfonic acid

Synonyms Sodium Naphthionate Molecular weight 245.23 Molecular Formula C10H8O3NSNa Descriptions 1-Amino-4-naphthalene sulfonic acid sodium salt is a greyish-white crystal.The sodium salt of industrial products contains two or four crystal water. It changes slowly into a rose colour in air.It is easily soluble in water and soluble in 95% of alcohol.Its chief use is employed in organic pigments or the sythesis of intermediates of azo-dyes. Specification Index High grade 1st grade Appearance Grayish white crystal Purity %min. 75 74 1-Naphthylamine%max. 0.02 0.02 Water insolubles %max. 0.1 0.2 Packing extra grade Specification In plastic woven bag of 50kgs nett or 25kgs nett each with plastic lining Notes Put in dark,cold and air through place to prevent sun light.

dyestuff intermediates/1-Naphthylamine-4-sulfonic acid sodium salt( Sodium Naphthionate 74% min)