Hello Abdul:

The  new molluscicide called Quinoid niclosamide (LDS) is composed of salt of quinoid-2’,5-dichloro-4’-nitrosalicylanilide, derived from niclosamide. Physical Properties of products: red-brown powder, molecular formula: [C13H7N2O4Cl2FNa +, temperature greater than 300 ° C (Niclosamide: pale yellow powder, melting at 225 ° C~230 ° C), soluble in water, ethanol, wherein the solubility in water is 1. 4g / L, almost insoluble in ether, yield 89%.The quinone Niclosamide salt structural formula is attached at the end. 

This product  has a patent Number  CN 101935289 B.

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Regards,

Luis Miguel

Flow this links 

https://pubchem.ncbi.nlm.nih.gov/compound/niclosamide#section=Top

https://en.wikipedia.org/wiki/Niclosamide

Thank for your answer, but i want to know the specific molecular weight of this salt