Intermediates For Dyes & Pigments

4-Nitro 2 Amino Phenol 6 Sulphonic Acid ( 4 NAPSA ) (Free Acid & Sodium Salt)

Product Name 4-Nitro 2 Amino Phenol 6 Sulphonic Acid (Free Acid)
Synonym PAN ACID
CAS No. 96-67-3
Molecular Weight 234 gms/mole
Empirical Formula C6H6O6N2S
Physical Appearance Light Redish Crystalline wet Cake
Assay By N.V. 60.00% Min.
Purity By HPLC 99.00 % Min.
Insoluble In dil HCL 2.0 % Max.
Fe Content 100 ppm Max.

4-NAPSA (Sodium Salt)

Product Name 4-Nitro 2 Amino Phenol 6 Sulphonic Acid (Sodium Salt)
Synonym PAN ACID
CAS No. 96-67-3
Molecular Weight 234
Empirical Formula C6H6O6N2S
Physical Appearnace Light Reddish Crystalline wet cake
Purity By N.V. 60% Min.
Insoluble in Dil. HCl 2.0% Max.
Fe Content 100 ppm Max.
Purity by HPLC 99.0% Min
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