Doxycycline Hydrochloride
Assay:  88.0%-94.0%
Details:  Description: Yellow, crystalline powder
Specific optical rotation: -105 to -102
pH: 2.0to3.0
Specific absorbance at 349nm: 0.28 to 0.31
Related substances: β -doxycycline≤ 2.0%
Oxytetracycline≤ 1.0%
Metacycline≤ 2.0%
Light-absorbing impurities at 490nm: ≤ 0.12
Ethanol: 4.3%-6.0%
Water: 1.5%-3.0%
Heavy metal: ≤ 20ppm
Specific optical rotation
Packing:25kg/drum