we have dmf, ep/usp/in-house standard
appearance |
yellow colour crystalline powder |
identification |
ir :the ir spectrum of the sample must be concordant with the ir spectrum obtained from reference standard |
|
hplc:the ir spectrum of the sample must be concordant with the ir spectrum obtained from reference standard |
water |
3.5%~6.0% |
related substance |
≤0.5% |
principal impurity |
≤0.3% |
residue on ignition |
≤0.1% |
heavy metals |
≤0.001% |
assay |
98.0~102.0% |
clarity&colour |
conforms |