USD $6.00-9.00 / Gram
USD $5.00-10.00 / Gram
USD $6.00-9.00 / Gram
USD $6.00-9.00 / Gram
USD $5.00-10.00 / Gram
USD $6.00-9.00 / Gram
USD $5.00-10.00 / Gram
USD $5.00-10.00 / Gram
USD $5.00-10.00 / Gram
ep/bp/cp
roxithromycin
characteristics |
white or almost white crystalline powder,odorless,bitter,slightly hygroscopicity |
solubility |
practically insoluble in water,freely soluble in ethanol or acetone,soluble in methanol |
specific optical rotation |
-82° to -87° |
identification |
|
ph |
8.0-10.0 |
related substances |
any single impurity≤1.0% total impurities≤4.0% |
water |
≤3.0% |
residue on ignition |
≤0.1% |
heavy metals |
≤10ppm |
assay (hplc) |
≥94.0% of c41h76n2o15 (anhydrous suastance) |
residual solvents |
methanol ≤3000ppm |
|
acetone ≤5000ppm |
|
n,n-dimethylformamide≤880ppm |
|
dichloromethane ≤600ppm |