tech grade; food grade;electronic grade; Tech grade: industrial use (85%,80%,75%): meet GB/T 2091-2008; JISK1449-78; Low heavy metal environmental protection; Customer requirements.Metal surface treatment agent, phosphate raw material products, organic reaction catalysts, refractory additives, activated carbon treatment agent. Food Grade:food additive(85%,80%,75%):meet GB3149-2004;FCC(IV); ...