Metaldehyde

Metaldehyde is a chemical compound commonly used as a pesticide. It is a white crystalline solid with a distinctive smell. Metaldehyde is most commonly used in agriculture to control slugs and snails.

Chemical Properties

Metaldehyde is a tetramer of acetaldehyde. It is a cyclic compound, with the formula (CH3CHO)4. It is not easily soluble in water, but it is soluble in most organic solvents. It is stable under normal temperatures and pressures, but it can decompose under high heat to produce toxic gases.

Uses

The primary use of metaldehyde is as a molluscicide, a type of pesticide that kills mollusks such as slugs and snails. It is used in both agricultural and home garden settings. When ingested by these pests, metaldehyde causes them to produce excessive amounts of mucus, leading to dehydration and death.

Health Effects

Exposure to metaldehyde can be harmful to humans and animals. Ingestion can cause nausea, vomiting, and abdominal pain. In severe cases, it can lead to liver damage or neurological effects such as seizures. It is also toxic to dogs and cats, and can be lethal if ingested.

Environmental Impact

Metaldehyde is toxic to a range of wildlife, including birds and aquatic organisms. It can also contaminate water sources if not used properly. There is ongoing research into the environmental impact of metaldehyde and potential alternatives.

Regulation

In many countries, the use of metaldehyde is regulated due to its potential impact on human health and the environment. For example, in the European Union, the use of metaldehyde as a pesticide has been banned since 2020.

See Also

• Pesticide
• Molluscicide
• Acetaldehyde

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