m-Phenylenediamine|1,8-Diaminonaphthalene|1,5-Diaminonaphthalene--Changzhou Chungang Chemical Co., L

4-Amino-1-naphthalenesulfonic acid

Synonyms

Sodium Naphthionate

Structural formula

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.

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