Methyl Parathion
Action/Use:
- Insecticide
Use:
Boll weevil; many insects on corn, cotton, dry beans, dry onions, rice, soybeans, wheat, pastures, and rangeland.
Identification
Common Name(s): Parathion-methyl (ISO, BSI); ; Methyl Parathion (JMAF, ESA); ; Metafos (USSR)
Chemistry
Class: Organophosphate.
Properties: Light brown liquid with organophosphate odor. Melting point 35°-36°C. Specific gravity d 20°/4°C = 1.36. Vapor pressure 0.2 mPa at 20°C. Compatible with most other pesticides except alkaline materials. Readily soluble in dichloromethane, 2-propanol, toluene. Hardly 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.: US EPA cancels sale and distribution of Methyl parathion by December 31, 2012. End-use products will not be sold after August 31, 2013 and cannot legally be used after December 31, 2013.
Environmental Guidelines
Water Solubility: 55 mg/l at 20°C
Soil Particle Adsorption: Believed to have little or no potential to contaminate groundwater
Safety Guidelines
Signal Word: DANGER
Toxicity Class: I
Toxicity: (Rat): Oral LD50 approx. 6 mg/kg; Dermal 67 mg/kg
Handling/storage Cautions: Store in original container, preferably in a locked area, away from children, feed, food. Do not heat above 55°C. Decomposes rapidly above 100°C, explosion may be induced
Suppliers and Branded Products
Basic Producers:
Agriphar S.A. (Chimac* Par M, Thionyl*)
Aimco Pesticides Limited (Paratox*)
Bayer CropScience (Bladan* M, Folidol* M, Metacide*)
Cheminova A/S (Parashoot*)
Hubei Sanonda Co., Ltd. (Prompt*, Sweeper*)
Indiclay (Para-All*)
Insecticides (India) Limited (Metacil*, Profit*)
K & N. Efthymiadis S.A. (Morphos*)
M/S Modern Insecticides Ltd. (Metathion*)
Formulators' Trade Names:
Agrolex Pte. Ltd. (Amithion*)
Asiatic Agricultural Industries Pte. Ltd. (Vitamethion*)
Cheminova, Inc. (Cheminova* Methyl)
Devidayal Sales Limited (Devithion*)
Dhanuka Agritech Ltd. (Dhanudol*, Dhanumar*)
Hektas Ticaret T.A.S. (Fosforin'M*)
Ingenieria Industrial, S.A. de C.V. (Bration*)
Kilpest India Ltd. (Kildot*)
Koruma Tarim A.S. (Korthion*)
Kuang Hwa Chemical Co., Ltd. (Dailysan*)
M/S HPM Chemicals and Fertilizers Ltd. (Hindol*, Parahit*)
Plant Remedies Pvt. Ltd. (Redol Dust*)
Polsas Chemicals and Machinery Co. (Parathol*)
Probelte S.A. (Probel MP-35*)
SAFA TARIM A.S. (Metidol* M)
United Phosphorus Inc. (Penncap-M*)
Premix Products:
+ Endosulfan
- Megasulfan Methyl* — SAFA TARIM A.S.
- Sulfanex Methyl*
- Thiosulfan-methyl* — Polsas Chemicals and Machinery Co.
+ Parathion
- Methion* — Insecticidas Internacionales, C.A.
+ Phosalone
- Taxylone* — Bayer CropScience
Discontinued Names:
Algodonero*
Big Daddy*
Cekumethion*
Declare*
Dipathio M*
Fosferno M50*
Hekthionex Methyl*
Metacap*
Methyl Parathion 2 Thiodan*
Nitrox*
Novafos-M*
OPM*
Parapest M-50*
Parasul*
Parataf*
Paration Metilico*
Paraton*
Paratox*
Pox M20*
Redol*
Sixty-Three Special*
Veto*
Wofatox*
Woprophos-M*
