:Chlormephos

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| ImageFile = Chlormephos.svg

| ImageSize = 200px

| ImageFile1 = Chlormephos-3D-spacefill.png

| ImageSize1 = 200px

| PIN = S-(Chloromethyl) O,O-diethyl phosphorodithioate

| OtherNames = Chlormethylfos

|Section1={{Chembox Identifiers

| CASNo = 24934-91-6

| CASNo_Ref = {{cascite|correct|}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 1N10F47JUS

| PubChem = 32739

| ChemSpiderID = 30345

| SMILES = ClCSP(=S)(OCC)OCC

| InChI = 1/C5H12ClO2PS2/c1-3-7-9(10,8-4-2)11-5-6/h3-5H2,1-2H3

| InChIKey = QGTYWWGEWOBMAK-UHFFFAOYAZ

| StdInChI = 1S/C5H12ClO2PS2/c1-3-7-9(10,8-4-2)11-5-6/h3-5H2,1-2H3

| StdInChIKey = QGTYWWGEWOBMAK-UHFFFAOYSA-N

}}

|Section2={{Chembox Properties

| C=5 | H=12 | Cl=1 | O=2 | P=1 | S=2

| Appearance =

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|Section3={{Chembox Hazards

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Chlormephos (chemical formula: C₅H₁₂ClO₂PS₂) is an organothiophosphate insecticide. It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.{{Cite journal | publisher = Government Printing Office | title = 40 C.F.R.: Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities | url = http://edocket.access.gpo.gov/cfr_2008/julqtr/pdf/40cfr355AppA.pdf | edition = July 1, 2008 | access-date = October 29, 2011 | archive-url = https://web.archive.org/web/20120225051612/http://edocket.access.gpo.gov/cfr_2008/julqtr/pdf/40cfr355AppA.pdf | archive-date = February 25, 2012 | url-status = dead }}

Chloromephos exhibits its toxic effects via the inhibition of the enzyme acetylcholinesterase, this is the same mechanism of action as the notorious chemical weapons known as V-series nerve agents.