Melting point :42-44°C
Boiling point :200°C
Density :1.398
vapor pressure :5.03 x 10^-5 mmHg at 25 °C (subcooled liquid vapor pressure calculated from GC retention time data,Hinckley et al., 1990)
Flash point :2 °C
storage temp. :APPROX 4°C
solubility :(At 25 °): 6.5, 7.9, 6.3, and 0.45 kg/kg in acetone, benzene, chloroform, and methanol, respectively (Worthing and Hance, 1991)
pka :-5.28±0.10(Predicted)
form :solid
color :White to off-white
Water Solubility :Insoluble. 0.00013 g/100 mL
Merck :13,2208
BRN :1545756
Henry's Law Constant :8.19 at 5 °C, 20.7 at 15 °C, 22.7 at 20 °C, 35.5 at 25 °C, 146 at 35 °C:in 3% NaCl solution: 32.3 at 5 °C, 82.9 at 15 °C, 301 at 25 °C, 535 at 35 °C (gas stripping-GC, Cetin et al., 2006)
Exposure limits :OSHA PEL: TWA 0.2 mg/m3, STEL 0.6 mg/m3; ACGIH TLV: TWA 0.2 mg/m3, STEL 0.6 mg/m3
Stability :Stable. Incompatible with strong oxidizing agents.
InChIKey :SBPBAQFWLVIOKP-UHFFFAOYSA-N
LogP :5.21 at 20℃
CAS DataBase Reference :2921-88-2(CAS DataBase Reference)
NIST Chemistry Reference :o,o-Diethyl-o-(3,5,6-trichloro-2-pyridyl)phosphorothioate(2921-88-2)
EPA Substance Registry System :Chlorpyrifos (2921-88-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P273 Avoid release to the environment. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P391 Collect spillage. Hazardous to the aquatic environment P405 Store locked up.