| ≥1 piece |
|
Product |
Ascorbic acid fine powder |
|
|
Analysis Contents |
Analysis standard |
Analysis Results |
|
Appearance |
White or Almost white Crystalline Powder |
Pass |
|
Identtification |
Positive Reaction |
Positive |
|
Melting Point |
About 190℃ |
190℃ |
|
PH |
2.1—2.6 |
2.4 |
|
Clarity of Solution |
Clrae |
Pass |
|
Colour of Solution |
≤BY7 |
<BY7 |
|
Heavy Metals |
≤10ppm |
<10ppm |
|
Iron |
≤2ppm |
<2ppm |
|
Copper |
≤5ppm |
<5ppm |
|
Impurity E |
≤0.2% |
<0.2% |
|
Sulphate ash(Residue on Ignition) |
≤0.1% |
<0.1% |
|
Specific Optical Rotation |
+20.5°--+21.5° |
+20.9° |
|
Assay |
99.0%--100.5% |
99.8% |
|
Particles Size |
Not less than 95% through 100 mesh |
98.5% |
|
Conclusion: The above product conforms to In-house standard |
||