Parathion
Action/Use:
- Insecticide
Identification
Common Name(s): Parathion (ISO, BSI, JMAF, ESA); ; Thiophos (USSR)
Chemistry
Class: Organophosphate.
Properties: Pale yellow liquid. Melting point 6.1°C. Vapor pressure 8.9 x 10-6 mbar at 20°C. Hydrolyzes slowly at pH 7 or below. Specific gravity 1.26. Incompatible with alkaline materials. Readily soluble in dichloromethane, 2-propanol, toluene. Soluble in n-hexane.
Mode of Action / Resistance Management
Chemical Group: Organophosphate
Mode of Action: Acetylcholine esterase inhibitor
Action Group: IRAC Group 1
Registration
U.S.A.: Not registered for use.
Environmental Guidelines
Soil Particle Adsorption: Little or no potential to contaminate groundwater
Water Solubility: 12.4 mg/l at 25°C
Hazards: (95% CI): Fish: LC50 (96 h) 1.5 mg/l. Bird: LD50 5.95 mg/l (bobwhite quail). Bee: LD50 (Topical, 24 h) 0.07-0.10 µg/bee (honeybee)
Safety Guidelines
Signal Word: DANGER
Toxicity Class: I
Handling/storage Cautions: Store in original container, preferably in locked area, away from children, food, feed. Do not heat above 55°C. Decomposes rapidly above 120°C, explosion may be induced
Toxicity: (Rat): Oral LD50 approx. 2 mg/kg. Dermal approx. 50 mg/kg
Suppliers and Branded Products
Basic Producers:
Formulators' Trade Names:
Agriphar S.A. (Chimac* Par H)
Premix Products:
+ Methyl Parathion
- Methion* — Insecticidas Internacionales, C.A.
Discontinued Names:
Bladan*
Co-thion*
Drifene*
Drifene* A.P.
Ecombi*
Endocide Plus*
Folidol*
Fosferno 50*
Niran*
Penncap-E*
Pox Konz*
Roethyl-P*
Sixty-Three Special*
Sopragam*
Tamaron* EP
Thiophos*
Wallop G*
Woprophos*
