Kezdőlap »Aminosavak» Hisztidin aminosav por (L-Histidine)
Certificate of Analysis
Product Name: L-Histidine
|
Item |
Specifications |
Results |
|
Appearance |
White crystals or crystalline powder |
Conforms |
|
Identification |
Infrared absorption specturm |
Conforms |
|
Specific optical rotation [а]D20 |
+12.0 o ~+12.8 o |
+12.2 o |
|
State of solution |
>98.0% |
99.0% |
|
Chloride(Cl) |
<0.02% |
Conforms |
|
Ammonium(NH4) |
<0.02% |
Conforms |
|
Sulfate(SO4) |
<0.02% |
Conforms |
|
Iron(as Fe) |
<10ppm |
7ppm |
|
Heavy Mental(Pb) |
<10ppm |
7ppm |
|
Arsenic(As) |
<1ppm |
Conforms |
|
Other Amino Acids |
Conforms |
Not detectable |
|
Loss on drying |
<0.20% |
0.13% |
|
Residue on ignition(sulfated) |
<0.10% |
0.04% |
|
Assay |
99.0%-100.5% |
99.54% |
|
PH |
7.0-8.5 |
7.9 |
Shelf life:2 years when properly stored.