High purity 99% white crystalline powder L(+)-Ascorbic acid CAS NO 50-81-7L(+)-Ascorbic acid
CAS No.:50-81-7
Molecular formula: C6H8O6
Molecular weight:176.13
Certification of Analysis
Certification of Analysis
Item
SpecificationsResults
Characteristics
White or almost white crystalline powder
Pass
Identification
Positive reaction
Pass
Melting Point
about 190°C
191°C
PH
2.1-2.6
2.3
Clarity of solution
Clear
Pass
Color of solution
≤BY7
<BY7
Copper
≤5ppm
<5ppm
Heavy metals
≤10ppm
<10ppm
Iron
≤2ppm
<2ppm
Lead
≤2ppm
<2ppm
Arsenic
≤3ppm
<3ppm
Oxalic acid
≤0.2%
<0.2%
Sulphated Ashes
≤0.1%
0.03%
Specific optical Rotation
+20.5°~ +21.5°
+21.1°
Assay
99.0%-100.5%
99.9%
Organic volatile impurities
Pass
Pass
Residual solvents
Methanol: NMT 3000ppm
<3000ppmPacking: 25kg net weight carton box or drum with two plastic inner linings and vacuum-sealed bag ,1 FCL=20MT
Features:
1) It contains over 99.5% of ascorbic acid
2) Mainly used in producing various medicines, it is an important medicine for
clinical supplementary treatment
3) It can be used in food additive. It is a good and safe nutritional agent as well
as an antiseptic and baking age
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