Introduction 

Temephos, an organophosphate larvicide, is known by various synonyms including Difos, Bithion, and CL 52160, and is identified by the CAS number 3383-96-8. This compound has been a cornerstone in pest control, particularly effective against mosquito larvae and other crop-damaging pests.

Chemical Characteristics

Temephos has a molecular formula of C16H20O6P2S3, a molar mass of 466.47, and a density of 1.3200. It appears as a solid with a melting point between 30-31°C and a predicted boiling point of 518.5±60.0 °C. It is typically stored at a cool 2-8°C to maintain its stability.

Background and Uses

First synthesized in 1971, Temephos gained prominence for its low toxicity and efficacy in controlling pests like thrips, rolling leaf moths, armyworms, and beans. Its impact on mosquito larvae is particularly notable, making it a preferred choice for mitigating the spread of diseases carried by these insects.

Application Insights

Temephos operates by inhibiting cholinesterase in the central nervous system of larvae, ensuring they do not mature into adults. Its use extends beyond agriculture into public health, where it treats water bodies to prevent the breeding of disease-transmitting insects.

Storage and Handling

Proper storage and transportation of Temephos are crucial. It should be kept in a well-ventilated, low-temperature environment and handled separately from food materials to avoid contamination.

Conclusion

Temephos stands out for its targeted action and safety profile, making it an invaluable tool in both agricultural and public health sectors. Its ability to effectively control a variety of pests while maintaining a low toxicity level to non-target organisms underscores its importance in integrated pest management strategies.