USD $5.00-10.00 / Gram
USD $1.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
USD $1.00-10.00 / Kilogram
tests items |
requirements |
results |
description |
an yellow or orange crystalline powder |
yellow crystalline powder |
m.p. |
should be 250-255℃,melting with decomposition
|
251-253℃,melting with decomposition |
identification |
|
|
chemical reaction |
should be positive reaction |
conforms |
chemical reaction |
should be positive reaction |
conforms |
chemical reaction |
should be positive reaction |
conforms |
test |
|
|
loss on drying |
≤0.5% |
0.1% |
residue on ignition |
≤0.1% |
0.06% |
chlorine |
≤0.014% |
<0.014% |
heavy metal |
≤20ppm |
20ppm |
iron salts |
≤0.002% |
<0.002% |
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 97.0%-103.0% of c12h10o5,calculated on dry substance. |
98.1% |