Sodium Hypophosphite CAS Number is 7681-53-0 or 10039-56-2? What's the difference? 

7681-53-0 is for Sodium Hypophosphite Anhydrous and 10039-56-2 is for Sodium Hypophosphite Monohydrate. 

SHP can absorb the moisture of the air, so anhydrous type only exists in the lab.

SHP is a strong reducing agent, so it's widely used in chemical plating, water reducing agent for concrete, water treatment, producing hypophosphites etc..

RICH Group is expertised in Sodium Hypophosphite with annual sales amount over USD48 million, welcome your inquiry.

For any questions and needs you can always reach us by mail: wuting@shrichgroup.com, wechat/whatsapp: +86 13166102802