... . CAS NO.: 2921-88-22. Common name: chlorpyrifos 3. Commodity name: chlorpyrifos(ANSI,ISO,BSI)4. Chemical name: O,O- ... 6. Structural formula:7. Physico-chemical properties: Appearance: Technical chlorpyrifos is white crystalline solid with a mild sulfur odor.Stability ... in water, readily soluble in most organic solvents8. Toxicity: Chlorpyrifos is moderate toxic to animals. Acute oral LD50 for rats ...