HIGH PURITY CHLORPYRIFOS S.No. Characteristic Specifications 1. Physical state Crystalline solid 2. Color Off white 3. Chloropyrifos ethyl content, % by mass, min 99.0 4. Moisture content, % by mass, max 0.1 5. Acidity as H,SO , % by mass, max 0.1 6. Melting point 42.5 °C - 43.5° C 7. Material insoluble in acetone, % by mass, max 0.05