Acephate 75% SP
Acephate is sold as a soluble powder, as emulsifiable concentrates, as pressurized aerosol, and in tree injection systems and granular formulations.
It is considered non-phytotoxic on many crop plants. Acephate and its primary metabolite, methamidophos, are toxic to Heliothis spp. that are considered resistant to other organophosphate insecticides. Acephate emits toxic fumes of various oxides of phosphorus, nitrogen, and sulfur when heated to decomposition. Symptoms of exposure to acephate include a slight irritation of eyes and skin.
The U.S. annually uses 4–5 million pounds of acephate.
The EU classifies Acephate as an Annex III substance, meaning that it meets the requirements to be considered a health and environmental hazard. [3]
Properties | |
---|---|
C4H10NO3PS | |
Molar mass | 183.16 g·mol−1 |
Appearance | colourless to white solid |
Density | 1.35 g/cm3 |
Melting point | 88–90 °C (190–194 °F; 361–363 K) |
79 g/100 mL | |
Solubility | very soluble in acetone soluble in ethanol |
Vapor pressure | 2x10−6 mmHg |
Pharmacology | |
Legal status |
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Hazards | |
GHS labelling:[1] | |
Warning | |
H302 | |
P264, P270, P301+P312, P330, P501 |