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Pesticides >> Insecticides >> Diazinon

Diazinon

Diazinon 95%TC
Diazinon 50%EC
Diazinon 60%EC
Diazinon 50%EW
Diazinon 10%GR
Diazinon 5%GR

Insecticide, acaricide
IRAC 1B; organophosphate

Diazinon

 

Diazinon NOMENCLATURE
Common name diazinon (BSI, E-ISO, (m) F-ISO, ANSI, ESA, BAN, JMAF); dimpylate (INN)
IUPAC name O,O-diethyl O-2-isopropyl-6-methylpyrimidin-4-yl phosphorothioate
Chemical Abstracts name O,O-diethyl O-[6-methyl-2-(1-methylethyl)-4-pyrimidinyl] phosphorothioate
CAS RN [333-41-5] EEC no. 206-373-8 Development codes G 24 480 (Geigy) Official codes OMS 469; ENT 19 507

Diazinon PHYSICAL CHEMISTRY
Composition Tech. is 95% pure. Mol. wt. 304.3 M.f. C12H21N2O3PS Form Clear colourless liquid; (tech., yellow liquid). B.p. 83-84 C/0.0002 mmHg; 125 C/1 mmHg V.p. 1.2 101 mPa (25;C) (OECD 104) KOW logP = 3.30 (OECD 107) Henry 6.09 10-2 Pa m3 mol-1 (calc.) S.g./density 1.11 (20 C) Solubility In water 60 mg/l (20 C). Completely miscible with common organic solvents, e.g. ethers, alcohols, benzene, toluene, hexane, cyclohexane, dichloromethane, acetone, petroleum oils. Stability Susceptible to oxidation above 100 ºC. Stable in neutral media, but slowly hydrolysed in alkaline media, and more rapidly in acidic media; DT50 (20 ºC) 11.77 h (pH 3.1), 185 d (pH 7.4), 6.0 d (pH 10.4). Decomposes above 120 ºC. pKa 2.6 (OECD 112) F.p. 62 °C

Diazinon COMMERCIALISATION
History Insecticide reported by R. Gasser (Z. Naturforsch. Teil B, 1953, 8, 225). Introduced in 1953 by J. R. Geigy S.A. (now Syngenta AG). Patents BE 510817; GB 713278 Manufacturers Aako; Agrochem; Cerexagri; Drexel; Hebei Golhil; Hegang Heyou; Hesenta; Makhteshim-Agan; Nippon Kayaku; Sannong; Sudarshan; Sundat; Syngenta

Diazinon APPLICATIONS
Biochemistry Cholinesterase inhibitor. Mode of action Non-systemic insecticide and acaricide with contact, stomach, and respiratory action. Uses Control of sucking and chewing insects and mites on a very wide range of crops, including deciduous fruit trees, citrus fruit, vines, olives, bananas, pineapples, vegetables, potatoes, beet, sugar cane, coffee, cocoa, tea, tobacco, maize, sorghum, alfalfa, flax, cotton, rice, ornamentals, glasshouse crops, forestry, etc., at 300-600 g/ha; soil insects (by soil application); phorid and sciarid flies in mushroom cultivation; flies, lice, mites, fleas, cockroaches, bedbugs, ants, and other insect pests in animal houses and household use. Seed treatment for maize, for control of frit flies and also conferring bird-repellent properties. Also used as a veterinary ectoparasiticide.

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