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1 Kilogram |
Negotiable |
Vitamin U Vitamin U supplier high purity Vitamin U
Tests Items |
Requirements |
Results |
Description |
Shuold be white crystalline powder,special smell.Easily lead in the air humidity, light and heat instability |
White crystalline powder,special smell.Easily lead in the air humidity, light and heat instability |
m.p. |
Should be 134-137℃,melting with decomposition
|
135-137℃,melting with decomposition |
Identification |
|
|
(1)Chemical reaction |
Should be positive reaction |
conforms |
(2)Chemical reaction |
Should be positive reaction |
conforms |
Test |
|
|
Loss on drying |
≤2.1% |
0.4% |
Residue on ignition |
≤0.2% |
0.1% |
Heavy Metal |
≤20ppm |
<20ppm |
Microbial Limit |
|
|
Bacterial count |
≤ 1000cfu /g |
<10cfu/g |
Yeast and mold count |
≤100cfu/g |
<10cfu/g |
E.coli |
Shouldn’t found |
Not found |
Assay |
It should contain not less than 99.0% of (C6H14ClNO2S),calculated on dry substance. |
100.9% |
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