Жевательные жевательные многовитамины
2,00-2,20 $
Сохранить в закладки 1600923366756:
Product Name: | Vitamin B2 |
Other Name: | Riboflavin |
CAS No.: | 83-88-5 |
MF: | C17H20N4O6 |
Appearance: | Orange Yellow Powder |
Purity: | 98% Min |
Storage | Keep in a cool, dry, dark location in a tightly sealed container or cylinder. |
Shelf Life | 24 Months |
Analysis | Specification | Result | ||
Physical Description | ||||
Appearance | Orange crystalline powder | Orange crystalline powder | ||
Odor | Slight odor | Slight odor | ||
Specific rotation | -120°~-140° | -129° | ||
Dimethylisoalloxazine | 440nm Absorbance 0.025Max | 0.011 | ||
Identification | ||||
Fluorescence experiment | The 1% (mg / ml) aqueous solution is pale yellow-green under transmitted light and has strong yellow-green fluorescence. Add dilute hydrochloric acid solution to disappear fluorescence or add a little sodium hydroxide solution to fluorescence disappear; add a little sodium dithionite, shake it, the yellow fades and the fluorescence disappears. | Complies | ||
UV | The ratio of A444nm/A267NM is between 0.36~0.39. The ratio of A375nm/A267NM is between 0.31~0.33. | A444nm/A267NM: 0.38 A375nm/A267NM: 0.32 | ||
Red light absorption spectrum | The infrared absorption spectrum of this product should be consistent with the control spectrum | Complies | ||
Assay | 98.0%-102.0% | 99.1% | ||
Loss on drying | 1.5% Max | 0.22% | ||
Ignition residue | 0.3% Max | 0.1% | ||
Heavy metals | 0.001%Max | <0.001% | ||
As | 0.0002%Max | <0.0002% | ||
Microbiology Control | ||||
Total Plate Count | 10,000CFU/g Max | <10,000CFU/g | ||
Yeast & Mold | 100CFU/g Max | <100CFU/g | ||
E.Coli | Negative | Negative | ||
Pseudomons | Negative | Negative | ||
Salmonellla | Negative | Negative | ||
Staphylococcus aureus | Negative | Negative | ||
Conclusion | Complies with the GB14752-2010 standards. | |||
Packing: Pack in paper-carton and two plastic-bags inside. | ||||
Storage: Store in a well-closed place with constant low temperature and no direct sun light. |
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