APPEARANCE WHITE OR ALMOST WHITE,CRYSTALLINE POWDER
IDENTIFICATION POSITIVE
MELTING POINT ABOUT 190°C
pH(5%,W/V) 2.1 ~2.6
SPECIFIC OPTICAL ROTATION +20.5°~21.5°
CLARITY AND COLOR OF SOLUTION CLEAR, ≤BY7
COPPER ≤0.0003%
HEAVY METALS ≤0.001%
IRON ≤0.0002%
MERCURY ≤0.0001%
ZINC ≤0.0025%
ARSENIC ≤0.0003%
LEAD ≤0.0002%
OXALIC ACID ≤0.2%
LOSS ON DRYING ≤0.1%
SULPHATED ASH ≤0.1%
ASSAY 99.0 ~ 100.5%
ORGANIC VOL.IMPURITIES MEET THE REQUIREMENTS
white powder ascorbic acid