Quinalphos
title: "Quinalphos" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["organophosphate-insecticides", "ethyl-esters", "quinoxalines"] topic_path: "general/organophosphate-insecticides" source: "https://en.wikipedia.org/wiki/Quinalphos" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
| ImageFile = Quinalphos.svg | ImageAlt = | PIN = O,O-Diethyl O-(quinoxalin-2-yl) phosphorothioate | OtherNames = O,O-diethyl O-quinoxalin-2-yl phosphorothioate; Diethquinalphion; Diethquinalphione |Section1={{Chembox Identifiers | CASNo = 13593-03-8 | CASNo_Ref = | UNII_Ref = | UNII = 26S837727Y | PubChem = 26124 | ChemSpiderID = 24335 | SMILES = CCOP(=S)(OCC)OC1=NC2=CC=CC=C2N=C1 | InChI = 1/C12H15N2O3PS/c1-3-15-18(19,16-4-2)17-12-9-13-10-7-5-6-8-11(10)14-12/h5-9H,3-4H2,1-2H3 | InChIKey = JYQUHIFYBATCCY-UHFFFAOYAW | StdInChI = 1S/C12H15N2O3PS/c1-3-15-18(19,16-4-2)17-12-9-13-10-7-5-6-8-11(10)14-12/h5-9H,3-4H2,1-2H3 | StdInChIKey = JYQUHIFYBATCCY-UHFFFAOYSA-N | SMILES2 = S=P(OCC)(OCC)Oc1nc2ccccc2nc1 |Section2={{Chembox Properties | C=12|H=15|N=2|O=3|P=1|S=1 | Appearance = Reddish-brown liquid | Density = | MeltingPtC = 31 | BoilingPt = | Solubility = 17.8 mg/L at 22 °C |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt =
Quinalphos is an organothiophosphate chemical chiefly used as a pesticide. It is a reddish-brown liquid. The chemical formula is C12H15N2O3PS, and IUPAC name O,O-diethyl O-quinoxalin-2-yl phosphorothioate. Ranked 'moderately hazardous' in World Health Organization's (WHO) acute hazard ranking, use of quinalphos, classified as a yellow label (highly toxic) pesticide in India, is widely used in the following crops: wheat, rice, coffee, sugarcane, and cotton.
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