D-Biotin is white or almost white crystalline powder or colourless crystals,very slight soluble in water and in alcohol,practically insoluble in acetone,dissolves in dilute solutions of alkali hydroxides.
Pharmaceutical raw material; Nutraceutical Ingredient ,Food additives ect.
|
Item |
Specification |
Result |
|
Appearance |
White or off-white crystalline powder |
White powder |
|
Identification |
Infrared absorption |
Conforms |
|
Specific rotation |
+89°~+93° |
+89.0° |
|
Loss on drying |
NMT0.5% |
0.1% |
|
Organic volatile impurity |
NMT 0.1% |
0.04% |
|
Melting point |
229~232 ℃ |
229~230.0℃ |
|
Heavy metals |
NMT0.002% |
<0.002% |
|
As |
NMT0.0003% |
<0.0003% |
|
Assay (Titration, 0.1N NaOH) |
98.5~100.5% |
99.9% |
