Synonyms: 3,5-dimethyl-1,3,5-thiadiazinane-2-thione (IUPAC); DMTT; Tiazon; 'Basamid' (Advan, Agro-Kanesho, Certis). Other products 'Dacorn' (Vapco); 'Dazom' (Chemia); 'Fongosan' (Kwizda). Discontinued products 'Dacron' * (Vapco); 'Dazoberg' * (Chimiberg); 'Mylone' * (Union Carbide); 'Salvo' * (Stauffer).
CAS No.: 533-74-4
EC No.: 208-576-7
Molecular Weight: 162.3
Molecular Formula: C5H10N2S
Form Colourless crystals; (tech. is an off-white to yellowish solid, with a sulfurous odour).
M.p. 104–105 °C (decomp.; tech. grade)
V.p. 0.58 mPa (20 °C); 1.3 mPa (25 °C)
Kow logP = 0.63 (pH 7)
Henry 2.69 × 10-5 Pa m3 mol-1
Solubility In water 3.5 g/l (20 °C). In cyclohexane 400, chloroform 391, acetone 173, benzene 51, ethanol 15, diethyl ether 6 (all in g/kg, 20 °C).
Stability Stable at temperatures up to 35 °C. Sensitive to temperatures >50 °C, and to moisture. Aqueous hydrolysis DT50 6–10 h (pH 5), 2–3.9 h (pH 7), 0.8–1 h (pH 9) (all 25 °C) (FAO Specifications).
Dazomet is a pre-planting soil fumigant, acting by decomposition to methyl isothiocyanate. Used as soil sterilant, applied prior to planting out crops, at 200–600 kg/ha. Controls soil fungi (Fusarium, Pythium, Rhizoctonia, Sclerotinia and Verticillium spp., and Colletotrichum coccodes), nematodes, germinating weed seeds, bacteria and soil insects. Also used as a slimicide in pulp and paper manufacture, and as a preservative in adhesives and glues. Phytotoxicity Highly phytotoxic to all green plants. Treated soils should not be planted until shown to be free of dazomet and its degradation products.
98% granular TC; 98% powder TC
Preparation: 50% WP; 80% WP
20kgs/multi-ply bag, on pallet.
Risks and Safety Information
Dazomet is regulated by UN as hazardous substance UN 3077, Class 9, PG III
Acute oral LD50 for rats 519 mg/kg. Skin and eye Acute percutaneous LD50 for rats >2000 mg/kg. Inhalation LC50 (4 h) for rats 8.4 mg/l air. NOEL NOAEL (90 d) for rats 1.5 mg/kg b.w. daily. Birds LD50 for bobwhite quail 415 mg/kg b.w. Fish LC50 (96 h) for rainbow trout 0.16 mg/l. Algae EC50 (96 h) for Scenedesmus subspicatus 1.0 mg/l. Bees Not toxic to bees when used as directed. LD50 (oral) >10 μg/bee; (contact) >50 μg/bee.