Item
Standard
Appearance
White to cream powder
pH
2.3~2.4
Melting Point
158℃~163℃
Optical rotation
+186.0°~+188.0°
Loss on drying
≤1.0%
Residue on ignition
≤0.2%
Free ascorbic acid
≤0.1%
Free glucose
Heavy metals(pb)
≤10ppm
Arsenic(AS2O3)
≤1ppm
Assay
≥98.0%
purity
≥99.5%