(E)-Mevinphos (E)-2-methoxycarbonyl-1-methylvinyl dimethyl phosphate
(Z)-Mevinphos (Z)-2-methoxycarbonyl-1-methylvinyl dimethyl phosphate
Mevinphos is an organophosphorous insecticide.
Mevinphos, existing in two forms (E)-Mevinphos and (Z)-Mevinphos, is a highly toxic organophosphate insecticide that is no longer recommended for agricultural use due to its safety risks. Here's a breakdown of key points:
Type of Substance: Organophosphate insecticide (insecticide that disrupts the nervous system of insects)
Chemical Forms:
- (E)-Mevinphos and (Z)-Mevinphos: These are stereoisomers, meaning they have the same chemical formula (C7H13O6P) but slightly different molecular structures due to the arrangement of atoms. This difference can affect some properties but not necessarily their toxicity in this case.
Function: Mevinphos worked by inhibiting an enzyme in insects called acetylcholinesterase. This enzyme is essential for normal nerve function. By inhibiting it, Mevinphos caused uncontrolled muscle stimulation and ultimately death in insects.
Past Use:
- Mevinphos was used as a broad-spectrum insecticide on various crops like vegetables, fruits, nuts, and alfalfa. However, due to its high toxicity and potential for human poisoning, its use has been banned or severely restricted in many countries.
Safety Concerns:
- Mevinphos is highly toxic to humans through inhalation, ingestion, or skin absorption. Symptoms of Mevinphos poisoning can be severe and include:
- Nausea, vomiting, diarrhea
- Muscle weakness, twitching, paralysis
- Difficulty breathing
- Seizures, coma
Current Status:
- Safer alternatives with lower mammalian toxicity have replaced Mevinphos for agricultural use.
- Due to the high risk of human poisoning, its use is strongly discouraged.