USD $10.00-10.00 / Gram
USD $25.10-28.30 / Gram
USD $10.00-10.00 / Gram
USD $25.10-28.30 / Gram
USD $25.10-28.30 / Gram
USD $10.00-10.00 / Gram
USD $25.10-28.30 / Gram
USD $2.00-10.00 / Kilogram
USD $10.00-10.00 / Gram
azithromycin :
items |
standard |
---|---|
appearance |
a white or almost white, crystalline powder. practically insoluble in water, freely soluble in anhydrous ethanol and in methylene chloride. |
identification |
(1) ir: conforms to the azithromycin rs spectrum (2) hplc: the retention time of azithromycin peak in the chromatogram of the assay preparation corresponds to that in the chromatogram of the standard preparation, as obtained in the assay. |
specific rotation |
-45°~-49°(anhydrous substance 20mg/ml dehydrated alcohol) |
crystallinity |
meets the requirements |
ph |
9.0~11.0 ( 0.1g /50ml methanol-water (1:1)) |
water |
4.0%~5.0% |
residue on ignition |
≤0.3% |
heavy metals |
≤0.0025% |
residual solvents |
(1) methylene chloride (2) acetone |
assay (hplc) |
c38h72n2o12 945~1030 μg /mg 945~1030 μg /mg |
azithromycin :
items |
standard |
---|---|
appearance |
a white or almost white, crystalline powder. practically insoluble in water, freely soluble in anhydrous ethanol and in methylene chloride. |
identification |
(1) ir: conforms to the azithromycin rs spectrum (2) hplc: the retention time of azithromycin peak in the chromatogram of the assay preparation corresponds to that in the chromatogram of the standard preparation, as obtained in the assay. |
specific rotation |
-45°~-49°(anhydrous substance 20mg/ml dehydrated alcohol) |
crystallinity |
meets the requirements |
ph |
9.0~11.0 ( 0.1g /50ml methanol-water (1:1)) |
water |
4.0%~5.0% |
residue on ignition |
≤0.3% |
heavy metals |
≤0.0025% |
residual solvents |
(1) methylene chloride (2) acetone |
assay (hplc) |
c38h72n2o12 945~1030 μg /mg 945~1030 μg /mg |