| Model: | - |
|---|---|
| Brand: | - |
| Origin: | Made In China |
| Category: | Chemicals / Organic Chemical Materials / Alkene |
| Label: | ascorbic acid |
| Price: |
-
|
| Min. Order: | - |
| Live Chat: | Last Online:01 Nov, 2011 |
|
Item
|
Analysis standard
|
Analysis results
|
|
Charachteristics
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White or almost white crystalline powder
|
pass
|
|
Identification
|
Positive reaction
|
Positive
|
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Melting point
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About 190℃
|
191℃
|
|
Ph
|
2.1-2.6
|
2.4
|
|
Clarity of solution
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Clear
|
Clear
|
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Colour of solution
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≤BY7
|
＜BY7
|
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Copper
|
≤5ppm
|
＜5ppm
|
|
Heavy metals
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≤10ppm
|
＜10ppm
|
|
Lead
|
≤2ppm
|
＜2ppm
|
|
Iron
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≤2ppm
|
＜2ppm
|
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Oxalic acid
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≤0.2%
|
＜0.2%
|
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Suphate ash(Residue on ignition)
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≤0.1%
|
0.05%
|
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Spcific optical rotation
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+20.5°- +21.5°
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+20.9°
|
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Assay
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99.0%-100.5%
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99.9%
|
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Organic volatile impurities
|
Pass
|
Pass
|
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Residual Solvents
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Methanol NMT 3000ppm
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＜3000ppm
|
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Conclusion :The above product conforms to BP2005 , USP29,EPV,FCCV
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