10-49 Grams
$4.50
50-99 Grams
$2.00
≥100 Grams
$1.60
Item | Specification | Result |
Identification | S Sample IR spectrum matches reference standard IR spectrum | Conforms |
Appearance | White or slightly yellow, crystalline powder | White Powder |
Specific Rotation, C=1 [a]D20 | +127 ~ +134 | +132 |
Melting Point | 149°~ 153° | 152° |
Solubility | Practically insoluble in water Soluble in methylene chloride Slightly soluble in anhydrous ethanol | Conforms |
Related Substances | Impurity A: 0.6% Max. | 0.16% |
Impurity B: 0.5% Max. | 0.13% | |
Impurity C: 0.3% Max. | 0.05% | |
Impurity D: 0.5% Max. | 0.1% | |
Unspecified Impurity: 0.1% Max. | 0.02% | |
Total Impurity | NML1.0% | 0.01% |
Loss on Dried | NML0.5% | 0.20% |
Sulphated Ash | NML0.1% | 0.03% |
Heavy Metals | NML10ppm | Complies |
Assay (On dried basis) | 98.5%-101.5% by HPLC |
1. Vinpocetine is applicable to the sequelae of cerebral infarction, cerebral hemorrhage sequelae, cerebral arteriosclerosis etc..
2. Vinpocetine is cerebral vasodilator, inhibit phosphodiesterase activity, increased vascular smooth muscle relaxation effect of messenger c-GMP, selectively increase cerebral blood flow, in addition can inhibit platelet aggregation, reduce blood viscosity, enhance the red cell deformation force, improve liquidity and microcirculation, promote brain tissue glucose uptake, increased brain oxygen consumption, improve cerebral metabolism.
Qingdao Sigma chemical Co., Ltd is is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
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