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Nanjing Elegant Nutraceuticals Co.,Ltd.
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Sell Arbutins
| Subject: | Sell Arbutins |
| Update Date: | 2005-05-18 09:19:00.0 |
| Valid Period: |
Never expired
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Description
Specifications:
1) Color and clarity of solution: clear, colorless without floaters
2) pH value (in 1% solution): 5.0 ~ 7.0
3) Specific rotation[?] D20: -63 ~ -66o
4) Melting point: 197 ~ 201oC
5) Loss on drying: ?1%
6) Heavy metal (Pb): ?10ppm
7) Hydroquinone: ?20ppm
8) Assay (by HPLC): ?99%
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