... .5%;tatal impurity: <1.0%; Ethanol, Methylene Chloride, ethyl acetate, N,N-dimethylformamide dimethyl acetal: Ethanol < 0.5%, Methylene Chloride<0.06%, ethyl ... acetate< 0.5%,N,N-dimethylformamide dimethyl acetal< 0.088%;Assay:not less than 98.5 ...