| ≥1 piece |
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 |