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Demephion
Names
Demephion-O
Demephion-S
IUPAC names O,O-Dimethyl O-[2-(methylsulfanyl)ethyl] phosphorothioate (demephion-O) O,O-Dimethyl S-[2-(methylsulfanyl)ethyl] phosphorothioate (demephion-S)
Identifiers
CAS Number	682-80-4 (demephion-O)^Y 2587-90-8 (demephion-S)^Y
3D model (JSmol)	(demephion-O): Interactive image (demephion-S): Interactive image
ChemSpider	103017 (demephion-O) 16480 (demephion-S)
PubChem CID	115123 (demephion-O) 17423 (demephion-S)
UNII	0O09494G0U (demephion-O)^Y 2678KW974N (demephion-S)^Y
InChI InChI=1S/C5H13O3PS2/c1-6-9(10,7-2)8-4-5-11-3/h4-5H2,1-3H3 Key: IATBEFPCSHFQJS-UHFFFAOYSA-N (demephion-S): InChI=1S/C5H13O3PS2/c1-7-9(6,8-2)11-5-4-10-3/h4-5H2,1-3H3 Key: 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⁻¹
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Demephion is an organothiophosphate insecticide. It is a mixture of two closely related structural isomers demephion-O and demephion-S.^[1]

Demephion-S is listed as an extremely hazardous substance according to the U.S. Emergency Planning and Community Right-to-Know Act.^[2]

References

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

v t e Pest control: Insecticides
Carbamates	Aldicarb Bendiocarb Carbaryl Carbofuran Ethienocarb Fenobucarb Oxamyl Methomyl Propoxur
Inorganic compounds	Aluminium phosphide Boric acid Chromated copper arsenate Copper(II) arsenate Copper(I) cyanide Cryolite Diatomaceous earth Lead hydrogen arsenate Paris Green Scheele's Green
Insect growth regulators	Benzoylureas Diflubenzuron Flufenoxuron Hydroprene Lufenuron Methoprene Pyriproxyfen
Neonicotinoids	Acetamiprid Clothianidin Dinotefuran Imidacloprid Nitenpyram Nithiazine Thiacloprid Thiamethoxam
Organochlorides	Aldrin Beta-HCH Carbon tetrachloride Chlordane Cyclodiene 1,2-DCB 1,4-DCB 1,1-DCE 1,2-DCE DDD DDE DDT Dicofol Dieldrin Endosulfan Endrin Heptachlor Kepone Lindane Methoxychlor Mirex Tetradifon Toxaphene
Organophosphorus	Acephate Azamethiphos Azinphos-methyl Bensulide Chlorethoxyfos Chlorfenvinphos Chlorpyrifos Chlorpyrifos-methyl Coumaphos Demeton-S-methyl Diazinon Dichlorvos Dicrotophos Diisopropyl fluorophosphate Dimefox Dimethoate Dioxathion Disulfoton Ethion Ethoprop Fenamiphos Fenitrothion Fenthion Fosthiazate Isoxathion Malathion Methamidophos Methidathion Mevinphos Mipafox Monocrotophos Naled Omethoate Oxydemeton-methyl Parathion Parathion-methyl Phenthoate Phorate Phosalone Phosmet Phoxim Pirimiphos-methyl Quinalphos Schradan Temefos Tebupirimfos Terbufos Tetrachlorvinphos Tribufos Trichlorfon
Pyrethroids	Acrinathrin Allethrins Bifenthrin Bioallethrin Cyfluthrin Cyhalothrin Cypermethrin Cyphenothrin Deltamethrin Empenthrin Esfenvalerate Etofenprox Fenpropathrin Fenvalerate Flumethrin Imiprothrin Metofluthrin Permethrin Phenothrin Prallethrin Pyrethrin (I, II; chrysanthemic acid) Pyrethrum Resmethrin Silafluofen Tefluthrin Tetramethrin Tralomethrin Transfluthrin
Ryanoids	Chlorantraniliprole Cyantraniliprole Flubendiamide Ryanodine Ryanodol
Other chemicals	Afoxolaner Amitraz Azadirachtin Buprofezin Chlordimeform Chlorfenapyr Cyromazine Fenazaquin Fenoxycarb Fipronil Fluralaner Hydramethylnon Indoxacarb Limonene Lotilaner Pyridaben Pyriprole Ryanodine Sarolaner Sesamex Spinosad Sulfluramid Tebufenozide Tebufenpyrad Veracevine Xanthone Metaflumizone
Metabolites	Oxon Malaoxon Paraoxon TCPy
Biopesticides	Bacillus thuringiensis Baculovirus Beauveria bassiana Beauveria brongniartii Metarhizium acridum Metarhizium anisopliae Nomuraea rileyi Lecanicillium lecanii Paecilomyces fumosoroseus Paenibacillus popilliae Purpureocillium lilacinum

Acetylcholine metabolism and transport modulators

Enzyme
(modulators)

ChAT	Inhibitors: 1-(-Benzoylethyl)pyridinium 2-(α-Naphthoyl)ethyltrimethylammonium 3-Chloro-4-stillbazole 4-(1-Naphthylvinyl)pyridine Acetylseco hemicholinium-3 Acryloylcholine AF64A B115 BETA CM-54,903 N,N-Dimethylaminoethylacrylate N,N-Dimethylaminoethylchloroacetate
AChE	Inhibitors: Reversible: Carbamates: Aldicarb Aminocarb Bendiocarb Bufencarb Carbaryl Carbendazim Carbetamide Carbofuran Carbosulfan Chlorbufam Chloropropham Dimetilan Ethienocarb Ethiofencarb Fenobucarb Formetanate Formparanate Methiocarb Methomyl Metolcarb Miotine Oxamyl Phenmedipham Pinmicarb Pirimicarb Propamocarb Propham Propoxur Thiofanox; Stigmines: Distigmine Eptastigmine Ganstigmine Neostigmine Phenserine Physostigmine Pyridostigmine Quilostigmine Rivastigmine Terestigmine; Others: Acotiamide Ambenonium Caffeine Donepezil EA-3990 EA-4056 Edrophonium Galantamine Huperzine A Ipidacrine Itopride Ladostigil Minaprine Octamethylene-bis(5-dimethylcarbamoxyisoquinolinium bromide) T-1123 TL-599 TL-1238 Tacrine Zanapezil Irreversible: Organophosphates: 2-Ethoxycarbonyl-1-methylvinyl cyclohexyl methylphosphonate Acephate Anatoxin-a(S) Armine Azinphos-ethyl Azinphos-methyl BAY-29952 Bensulide Cadusafos Carbophenothion Chlorethoxyfos Chlorfenvinphos Chlorpyrifos Chlorpyrifos-methyl Coumaphos Crotylsarin Cyanophos Cyclosarin (GF) Demephion Demeton Demeton-S-methyl Dialifor Diazinon Dichlorvos Dicrotophos Diisopropyl fluorophosphate Diisopropylphosphate Dimefox Dimethoate Dimethyl 4-(methylthio)phenyl phosphate Dioxathion Disulfoton EA-2012 EA-2054 EA-2098 EA-2192 EA-2613 EA-3148 EA-4352 Echothiophate Ethylsarin (GE) Endothion Ethion Ethoprop Fenamiphos Fenitrothion Fenthion Fluorotabun Fonofos Formothion Fosthiazate GD-42 GH GT-45 GV Hexaethyl tetraphosphate Isofluorophate Isoxathion Leptophos Malaoxon Malathion Methamidophos Methidathion Methyl phenkapton Methylfluorophosphonylcholine (MFPCh) Metrifonate Mevinphos Mipafox Monocrotophos Naled Novichok agent Omethoate Oxydemeton-methyl Paraoxon Parathion Parathion-methyl Phorate Phosalone Phosfolan Phosmet Phosphamidon Phoxim Pirimiphos-methyl Profenofos Prothoate Ro 3-0340 Ro 3-0346 Ro 3-0347 Ro 3-0351 Ro 3-0352 Ro 3-0397 Ro 3-0411 Ro 3-0412 Ro 3-0417 Ro 3-0419 Ro 3-0422 Ro 3-0433 Sarin (GB) Schradan Soman (GD) Tabun (GA) Tebupirimfos Temefos Terbufos Tetrachlorvinphos Tetraethyl pyrophosphate Triazofos Tribufos Trichlorfon Trichloronate Tricresyl phosphate VE VG VM VP VS VR VX; Others: Demecarium Fasciculins (green mamba toxins) (1, 2, 3, 4) Onchidal (Onchidella binneyi) Methanesulfonyl fluoride Unsorted: α-Pinene α-Viniferin Affinine Affinisine Arisugacin A Bulbocapnine Conodurine Coronaridine Corydaline Corynoline Crimidine Cyclanoline Cymserine Harmaline Kobophenol A Lactucopicrin Lycorine Phosacetim Rosmarinic acid Stercuronium iodide Taspine Tetrahydrocannabinol Ungeremine Ungiminorine Dimethylcarbamoyl fluoride BW284C51 Reactivators: Asoxime chloride Methoxime Obidoxime Pralidoxime Trimedoxime bromide
BChE	Inhibitors: Affinine Affinisine Conodurine Cymserine Ladostigil Profenamine (ethopropazine) Rivastigmine Tacrine ZINC-12613047 Many of the other AChE inhibitors listed above

Transporter
(modulators)

CHT	Inhibitors: Hemicholinium-3 (hemicholine) Triethylcholine Enhancers: Coluracetam
VAChT	Inhibitors: Vesamicol

Release
(modulators)

Inhibitors	SNAP-25 inactivators: Botulinum toxin (A, C, E) VAMP inactivators: Botulinum toxin (B, D, F, G) Others: [[Chemistry:BungaroBungarotoxins (Beta-Bungarotoxin\|β-bungarotoxin]], γ-bungarotoxin)
Enhancers	LPHN agonists: α-Latrotoxin Others: Atracotoxins (e.g., robustoxin, versutoxin) Crotoxin

See also: Receptor/signaling modulators • Muscarinic acetylcholine receptor modulators • Nicotinic acetylcholine receptor modulators

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Original source: https://en.wikipedia.org/wiki/Demephion. Read more