item | standard | analysis data |
appearance | white crystalline powder | conforms |
solubility (1.0g/20ml h2o) | clear colorless | conforms |
specific rotation(a)d20 (c=1 ,h2o) | +7.5º to +8.5º | +7.9º |
assay | 98.0-102.0% | 99.2% |
melting point (ºc) | 200ºc to 210 ºc | conforms |
heavy metals(pb) | not more than 20ppm | 10ppm |
chloride(c1) | not more than 0.02% | 0.012% |
iron(fe) | not more than 10ppm | 8ppm |
arsenic(as2o3) | not more than 4ppm | <4ppm |
moisture | not more than 1.0% | 0.6% |
residue on ignition | not more than 0.2% | 0.07% |
total plate count | not more than 1,000cfu/g | conforms |
yeast and mold | not more than 100cfu/g | conforms |
ph | 5.0-6.0 | 5.4 |
conclusion | the product conforms to the standard | |
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