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Demephion

Demephion-O
Demephion-S
Names
IUPAC names O,O-Dimethyl O- phosphorothioate (demephion-O) O,O-Dimethyl S- phosphorothioate (demephion-S)
Identifiers
CAS Number	682-80-4 (demephion-O) 2587-90-8 (demephion-S)
3D model (JSmol)	(demephion-O): Interactive image (demephion-S): Interactive image
ChemSpider	103017 (demephion-O) 16480 (demephion-S)
ECHA InfoCard	100.221.416
PubChem CID	115123 (demephion-O) 17423 (demephion-S)
UNII	0O09494G0U (demephion-O) 2678KW974N (demephion-S)
CompTox Dashboard (EPA)	DTXSID50274158
InChI InChI=1S/C5H13O3PS2/c1-6-9(10,7-2)8-4-5-11-3/h4-5H2,1-3H3Key: IATBEFPCSHFQJS-UHFFFAOYSA-N (demephion-S): InChI=1S/C5H13O3PS2/c1-7-9(6,8-2)11-5-4-10-3/h4-5H2,1-3H3Key: PSTWJANBJOHFQJ-UHFFFAOYSA-N
SMILES (demephion-O): S=P(OC)(OCCSC)OC (demephion-S): O=P(OC)(OC)SCCSC
Properties
Chemical formula	C5H13O3PS2
Molar mass	216.25 g·mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Demephion is an organothiophosphate insecticide. It is a mixture of two closely related structural isomers demephion-O and demephion-S.

Demephion-S is listed as an extremely hazardous substance according to the U.S. Emergency Planning and Community Right-to-Know Act.

References

1. demephion in the Pesticide Properties DataBase (PPDB), accessed on 2019-01-24.
2. 40 CFR Part 355 Appendix A Extremely Hazardous Chemicals

• Acetylcholinesterase inhibitors
• Organophosphate insecticides
• Thioethers
• Methyl esters