Parathion-methyl

Parathion-methyl is an organophosphate compound that is used as a pesticide. It is a derivative of parathion and is also known as methyl parathion.

Chemistry

Parathion-methyl is a white crystalline solid with a characteristic odor. It is soluble in most organic solvents and slightly soluble in water. The chemical formula of parathion-methyl is C8H10NO5PS. It is a phosphorothioate ester of p-nitrophenol.

Use

Parathion-methyl is primarily used as an insecticide and acaricide. It is effective against a wide range of insects and mites that infest field crops, fruit trees, and vegetables. It is also used to control pests in stored grain.

Toxicity

Parathion-methyl is highly toxic to humans and animals. It inhibits acetylcholinesterase, an enzyme that is essential for normal nerve function. Symptoms of poisoning include nausea, vomiting, abdominal cramps, sweating, headache, dizziness, and in severe cases, seizures, loss of consciousness, and death.

Environmental Impact

Parathion-methyl is toxic to birds, fish, and bees. It is also harmful to non-target insects and other beneficial organisms. It is not readily biodegradable and can persist in the environment for long periods.

Regulation

Due to its high toxicity and environmental impact, the use of parathion-methyl is heavily regulated in many countries. In the European Union, it has been banned since 2003. In the United States, it is classified as a restricted use pesticide.

See Also

• Organophosphate poisoning
• Pesticide toxicity to bees
• Environmental impact of pesticides