2,3-Quinoxalinedimethanol 1,4-dioxide

Green - yellow crystal powder Melting point 169~172°C pH 5.8~7.0 Loss on dry NMT 1.5% Heavy metals NMT 0.001 % Sulphate ashes NMT 0.1 % Microbiological cleanliness Category 1.2 Pyrogen test The drug should be apyrogenic Halogens NMT 0.02 % Residual Solvents MeOH NMT 100ppm EtOH NMT 200ppm Total impurity NMT 1.0% Purity NLT 99.0 %