Pharmaceutical grade powder Chloroquine diphosphate for Inhibition of new coronavirus. Product name: Chloroquine diphosphate CAS No. 50-63-5 MF: C18H32ClN3O8P2 MW: 515.86 Melting point: 200 ° C (dec.) Storage conditions: Desiccate at RT Solubility: H2O: 50 mg/mL, clear Appearance: Solid powder PH value: pH(100g/l, 25℃) : 3.8～4.3 Solubility: Soluble in water Use: Chloroquine phosphate has a certain effect on COVID-19;  Anti-malarial drugs and anti-amebic …