USD $5.00-10.00 / Gram
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 $10.00-100.00 / Kilogram
USD $5.00-10.00 / Gram
USD $5.00-10.00 / Gram
appearance yellow crystalline powder identification according to usp37 specific optical rotation -188? ~-200? solubility freely soluble in water sparingly soluble in ethanol,solutions in water become turbid on standing to the precipitation of oxytetracycline. ph 2.3--2.9 ph value 270--290 heavy metals not more than 50 light absorbing impurities a(0.2%,1cm,430nm)<50 a(1%,1cm,490nm)<0.20 related substances content of impurity peak meets the requirement sulfated ash not more than 0.5% water not more than 2.0% assay(by hplc) 95.0%--102.0% |