CHLORPYRIFOS METHYL S.No. Characteristic Specifications 1. Physical state Crystalline solid 2. Color Pale yellow to off white 3. Chloryrifos methyl content, % by mass, min 97.0 4. moisture content, % by mass, max 0.1 5. Melting point 45.5° C - 46.5° C 6. Meterial insoluble in acetone, % by mass, max 0.5