Technical Data Sheet
|
Items |
Specification |
Results |
|
Assay |
≥99.5% |
99.9% |
|
Description |
White needle crystals or crystalline powder,IR spectrum conforms |
Pass |
|
Specific rotation [a]D20 |
+175.0°- +185.0° |
+178.2° |
|
Clarity of water solution |
Transparent colorless no suspended |
Conforms |
|
PH（1% water solution） |
5.0-7.0 |
6.50 |
|
Loss on drying % |
≤0.5 |
0.16 |
|
Residue on ignition % |
≤0.5 |
0.04 |
|
Melting Point |
202.0-210.0℃ |
206.5 ℃ |
|
Hydroquinone |
Negative |
Pass |
|
Arsenic |
≤2ppm |
<2ppm |
|
lead |
≤10ppm |
<10ppm |
|
Mercury |
≤1ppm |
<1ppm |
|
Methanol |
≤2000 ppm |
<1000 |
|
Aerobic bacterial count |
≤1000cfu/g |
Pass |
|
Molds and yeast count |
<100cfu/g |
Pass |
|
Fecal coliforms |
Negative /g |
Pass |
|
Pseudomonas aeruginosa |
Negative /g |
pass |
|
Staphylococcus aureus |
Negative/g |
pass |
|
