Phosphorothioic acid,S-[(5-methoxy-4-oxo-4H-pyran-2-yl)methyl] O,O-dimethyl ester (2778-04-3)

 Endothion (CAS NO.2778-04-3) is also called 4-18-00-01160 (Beilstein Handbook Reference) ; 5-Methoxy-2-(dimethoxyphosphinylthiomethyl) pyrone-4 ; AI3-24653 ; BRN 0252435 ; ENT 24,653 ; EPA Pesticide Chemical Code 422100 ; Niagara 5767 ; O,O-Dimethyl S-(5-methoxy-4-oxo-4H-pyran-2-yl) phosphorothioate ; O,O-Dimethyl phosphorothioate S-ester with 2-(mercaptomethyl)-5-methoxy-4H-pyran-4-one ; O,O-Dimethyl-S-((5-methoxy-pyron-2-yl)-methyl)-thiolphosphat Phosphopyrone ; Phosphorothioic acid, O,O-dimethyl ester, S-ester with 2-(mercaptomethyl)-5-methoxy-4H-pyran-4-one ; S-5-Methoxy-4-pyron-2-ylmethyl O,O-dimethyl phosphorothioate ; Thiophosphate de O,O-dimethyle et de S-((5-methoxy-4-pyronyl)-methyle) . Endothion (CAS NO.2778-04-3) is white crystals with a slight odor.
Organothiophosphates, such as endothion, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides. Endothion is poisonous to humans. Its toxic effects are most likely related to action on the nervous system. Cylinder may explode in heat or fire. Fire and runoff from fire control water may produce irritating or poisonous gases. When heated to decomposition, endothion emits very toxic fumes of phosphorous oxides and sulfur oxides. So the storage environment should be ventilate, low-temperature and dry. Keep Endothion (CAS NO.2778-04-3) separate from raw materials of food.

EPA Extremely Hazardous Substances List.