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The thermal decomposition of dimethoate
R Andreozzi1, G Ialongo, R Marotta
1Istituto di Ricerche Sulla Combustione (CNR), P.le V. Tecchio, Naples, Italy. andreo@hp3.na.cnr.it
Journal of Hazardous Materials
|May 25, 1999
Summary
The thermal decomposition of dimethoate, an organophosphorus pesticide, begins above 369 K. This process releases energy and produces various thiophosphoric compounds.
Area of Science:
- Environmental Chemistry
- Chemical Engineering
- Materials Science
Background:
- Organophosphorus pesticides like dimethoate are widely used in agriculture.
- Understanding pesticide decomposition is crucial for safety and environmental impact assessment.
- Thermal decomposition pathways require detailed investigation.
Purpose of the Study:
- To investigate the thermal decomposition of dimethoate.
- To determine reaction kinetics and energy release.
- To identify the resulting decomposition products.
Main Methods:
- Thermal analysis techniques were employed.
- Experiments were conducted at temperatures above 369 K.
- Decomposition products were analyzed.
Main Results:
- Dimethoate exhibits significant thermal decomposition above 369 K.
- A notable increase in pressure was observed post-decomposition.
- Several thiophosphoric compounds were identified as byproducts.
Conclusions:
- Dimethoate's thermal instability necessitates careful handling and storage.
- The identified decomposition products may pose environmental or health risks.
- Further research into mitigation strategies is warranted.