Table 1.

Some important characteristics of chlorpyrifos

	IUPAC name: O,O-Diethyl O-3,5,6-trichloropyridin-2-yl phosphorothioate
CAS Number	2921-88-2
Chemical formula	C9H11Cl3NO3PS
Molar mass	350.57 g mol−1
Density	1.398 g cm−3 (43.5 °C)
Melting point	43 °C (109 °F; 316 K)
Boiling point	160 °C; 320 °F; 433 K (decomposes)
Solubility in water	2 mg L−1
Octanol-Water Partition Coefficient (Kow)	4.70
Soil Sorption Coefficient (Koc)	360 to 31,000 depending on soil type and environment.

Source: National Pesticide Information Center (NPIC, [25])