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Product name: ascorbic acid
Synonyms: L-Ascorbic acid; vitamin C; VC
Molecular Formula: C 6 H 8 O 6
Molecular Weight: 176.12
CAS No: 50-81-7
Quality standard.: ( see table )
The quality conforms to BP/USP.
|
Ascorbic Acid Quality standard |
|
|
Item |
Index |
|
Characteristic |
white crystalline powder |
|
Melting point |
190-192 |
|
Specific rotation |
+21.0 |
|
Identification |
Conforms |
|
Assay |
≥ 99.0% |
|
Clarity of solution |
Fine |
|
Colour of solution(A 420nm ) |
A≤0.03 |
|
Residue on ignition |
≤0.1% |
|
Ferrite |
≤2ppm |
|
Copper |
≤5ppm |
|
Heavy metals |
≤10ppm |
