If you read phosphine, you'll see that sodium hypophosphite ( Na [ H 2 PO 2 ] ) and sodium phosphite ( Na 2 [ HPO 3 ] ) are by-products.
12.
The reaction is accomplished when hydrogen is released by a reducing agent, normally sodium hypophosphite ( Note : the hydrogen leaves as a hydride ion ) or thiourea, and oxidized, thus producing a negative charge on the surface of the part.
