molecular formula: c10h14no5ps molecular weight: 291.26 chemical name: o,o-diethyl-o-(4-nitrophenyl) phosphorothioate properties: technical parathion is a yellowish oily liquid with a garlic odour. it is readily soluble in benzene, acetone, ethanol and many other organic solvents, stable in neutral or weak acidic medium, but hydrolyzed in the presence of alkali. specific gravity of pure parathion d425:1.265, refr. index nd25: 1.5370, solubility at 25��: 24 mg/l in water.