APPEARANCE WHITE TO SLIGHTLY YELLOW CRYSTALLINE POWDER
IDENTIFICATION POSITIVE
pH(10%,W/V) 6.8 ~7.4
SPECIFIC OPTICAL ROTATION +95°~+97°
HEAVY METALS (as Pb) ≤0.001%
MERCURY ≤0.0001%
ASSAY (as As C12H11CaO12·2H2O) ≥98.0%
(on the as is basis)
LEAD ≤0.0002%
LOSS ON DRYING ≤0.1%
FLUORIDE ≤0.001%
ARSENIC (as As) ≤0.0003%
OXALATE PASS
white to slightly yellow powder calcium ascorbate