tolclofos-methyl

95%tech, 50%wp, 25%ec,

Fungicide

FRAC  14; aromatic hydrocarbon; chlorophenyl

NOMENCLATURE

Common name tolclofos-methyl (BSI, E-ISO, (m) F-ISO)

IUPAC name O-2,6-dichloro-p-tolyl O,O-dimethyl phosphorothioate 

Chemical Abstracts name O-(2,6-dichloro-4-methylphenyl) O,O-dimethyl phosphorothioate 

CAS RN [57018-04-9]  Development codes S-3349 (Sumitomo) 

PHYSICAL CHEMISTRY

Mol. wt. 301.1  M.f. C9H11Cl2O3PS  Form Colourless crystals; (tech., colourless to light brown solid).  M.p. 78-80 ºC  V.p. 57 mPa (20 ºC)  KOW logP = 4.56 (25 ºC)  Solubility In water 1.10 ppm (25 ºC). In hexane 3.8%, xylene 36.0%, methanol 5.9%.  Stability Stable to light, heat and moisture. Decomposed in alkaline and acidic media.  F.p. 210 ºC (Cleveland open cup) 

APPLICATIONS

Biochemistry Acts by inhibition of phospholipid biosynthesis, leading to inhibition of germination of spores and growth of fungal mycelium.  Mode of action Non-systemic contact fungicide with protective and curative action.  Uses Control of soil-borne diseases caused by Rhizoctonia, Corticium, Sclerotium and Typhula spp. on potatoes, sugar beet, cotton, peanuts, vegetables, cereals, ornamentals, bulb flowers, lawn turf, etc. Used as a seed, bulb or tuber treatment, soil drench, foliar spray, or by soil incorporation.  Formulation types DP; EC; SC; WP; Seed treatment.  Compatibility Incompatible with alkaline compounds.