- Contact Person : Mr. Lee David
- Company Name : Zhengzhou Liangwei Trading Co., Ltd.
- Tel : 86-371-67770889
- Fax : 86-371-67770969
- Address : Henan,Zhengzhou,Rm915,Zhengzhou Science and Tech Mansion
- Country/Region : China
- Zip : 450007
Vitamin C (ascorbic acid )
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Product Name:Ascorbic acid Test time:08/28/2008
Date of manufacturing :08/28/2008 Batch No.:0808411975
Producd standard:BP2005/USP29/EPV/FCCV
Item | Analysis standard | Analysis results |
Charachteristics | White or almost white crystalline powder | pass |
Identification | Positive reaction | Positive |
Melting point | About 190 | 191 |
Ph | 2.1-2.6 | 2.4 |
Clarity of solution | Clear | Clear |
Colour of solution | ≤BY7 | BY7 |
Copper | ≤5ppm | 5ppm |
Heavy metals | ≤10ppm | 10ppm |
Lead | ≤2ppm | 2ppm |
Iron | ≤2ppm | 2ppm |
Oxalic acid | ≤0.2% | 0.2% |
Suphate ash(Residue on ignition) | ≤0.1% | 0.05% |
Spcific optical rotation | +20.5°- +21.5° | +20.9° |
Assay | 99.0%-100.5% | 99.9% |
Organic volatile impurities | Pass | Pass |
Residual Solvents | Methanol NMT 3000ppm | 3000ppm |
Conclusion :The above product conforms to BP2005 , USP29,EPV,FCCV | ||
Vitamin C (ascorbic acid )