Item
Unit
Index
Appearance
%
super fine white powder
Purity (total acid)
≥99.0
Water content
≤0.30
DSS
Melting point
℃
286-289
Ash content
≤0.03
Chroma (in 5% ethanol)
Hazen
≤15
Heavy metal (base on Pb)
PPM
≤10
Arsenic (base on As)
≤3
Solubility (25℃)
g/100gwater
≥1.0