1)Common name: Insecticide

2)Chemical name: O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl)phosphorothioate
3)CAS NO.: 2921-88-2
4)Formulation:97%TC;480g/L EC;400g/L EC;120g/L EC;

                  Chlorpyrifos 500g/L+Cypermethrin 50g/L EC  
                               
5)Molecular formula: C9H11Cl3NO3PS
6)Molecular weight: 350.6
7)Physico-chemical properties:

8)Appearance: Technical chlorpyrifos is white crystalline solid with a mild sulfur odor.

9)Stability: Wide stability at room temperature.

10)Density: 1.398(43.5°C).

11)Melting Point: 41.5~43.5°C.

12)Vapour Pressure: 2.5mPa(25°C).

13)Solubility: 1.2mg/l in water, readily soluble in most organic solvents
14)Toxicity: Chlorpyrifos is moderate toxic to animals. Acute oral LD50 for rats 163mg/kg, acute dermal LD50 for rats>2g/kg; Slight irritation to eye, serious to skin. Subacute oral non-effect level for rats 0.03mg/kg, chronic oral non-effect level 0.1mg/kg. Chronic oral non-effect level for dog 0.03mg/kg. No carcinogenic, mutagenic and teratogenic effects at experimental dosage. Maximum allowed concentration0.2mg/m3 (TLV) in indoor air. High toxic to fish and aquatic organisms, LD50 for bulltrout 15mg/l (96 h, 72°C). Toxic to bees. Acute oral LD50 of 40.7% chlorpyrifos EC for rats 590mg/kg, acute dermal for rabbits LD50 2330mg/kg, irritation to skin and eyes. Acute oral of 14% G for rats LD50>2g/kg, acute dermal for rats LD50>2g/kg, acute inhale LD50>0.007µg/L(7 h), irritation to eyes and skin.

15)Usage: Thiophosphate insecticide; Contact, stomach, and respiratory action.
Non persistent on leaves, persistent in soil, high efficiency for the control of underground pests. At the recommended dosage, no phytotoxicity for most crop, but sensitive to tobacco.