China sell CAS 1321-69-3 Sodium Naphthalenesulphonate with factory price

What is Sodium Naphthalenesulphonate ?

Sodium naphthalenesulphonate is one of the important intermediates of azo pigments, widely used in the synthesis of direct dyes and reactive dyes, and is also one of the antidote for nitrite and iodine poisoning. 
It can also be used as an acceptor for hydrogen bonds, making sodium naphthalenesulphonate widely used in complexing with various metals (such as Fe, Zn, Cd, Ni, etc.) for toxic chemical leakage monitoring materials,Synthesis of optical devices, gas absorbing materials and clinical medical research. 
It can also be used in thermal switches, optical switches and information storage element materials, DNA structural probes, DNA molecular optical switches and other fields.