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CAS 59669-26-0 Thiodicarb 95%TC Molluscicides Agrochemicals White Crystalline Solid

CAS 59669-26-0 Thiodicarb 95%TC Molluscicides Agrochemicals White Crystalline Solid

Brand Name : molotus

Model Number : thiodicarb 95%TC

Place of Origin : china

MOQ : as demand

Payment Terms : Western Union, T/T, D/P, D/A, L/C

Delivery Time : 15-20 days for large package; 20-25 days for small package

Packaging Details : net 25kg in bag or drum or according to client’s requirement

item : thiodicarb 95%TC

content of a.i : ≥95%

Appearance : white crystalline solid

Density : 1.17g/cm³

Melting Point : 78°C

Flash Point : 164.1°C

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Thiodicarb 95%TC Molluscicides Agrochemicals CAS 59669-26-0 White Crystalline Solid


NOMENCLATURE

Common name thiodicarb (BSI, draft E-ISO, (m) draft F-ISO, ANSI)

IUPAC name 3,7,9,13-tetramethyl-5,11-dioxa-2,8,14-trithia-4,7,9,12-tetra-azapentadeca-3,12-diene-6,10-dione

Chemical Abstracts name dimethyl N,N'-[thiobis[(methylimino)carbonyloxy]]bis(ethanimidothioate)

CAS RN [59669-26-0] EEC no. 261-848-7 Development codes CGA 45156 (Ciba-Geigy); UC 80 502; UC 51762 (both Union Carbide); RPA 80600 M (Rhône-Poulenc) Official codes AI3-29311; OMS 3026


PHYSICAL CHEMISTRY

Composition Tech. grade is 96% pure. Mol. wt. 354.5 M.f. C10H18N4O4S3 Form Colourless crystals; (tech., pale tan crystals). M.p. 173-174 ºC V.p. 5.7 mPa (20 ºC) KOW logP = 1.62 Henry 4.31 ´ 10-2 Pa m3 mol-1 (calc.) S.g./density 1.44 g/ml (20 ºC) Solubility In water 35 mg/l (25 ºC). In dichloromethane 150, acetone 8, methanol 5, xylene 3 (all in g/kg, 25 ºC). Stability Stable at pH 6, rapidly hydrolysed at pH 9 and slowly at pH 3 (DT50 c. 9 d). Aqueous suspensions are decomposed by sunlight. Stable up to 60 ºC.


APPLICATIONS

Biochemistry Cholinesterase inhibitor. Mode of action Insecticide with predominantly stomach action, but also limited contact action. As a seed treatment, rapidly translocated systemically through the plant. Molluscicide which provokes paralysis and death. Uses Control of all stages of major Lepidoptera and Coleoptera pests and some Hemiptera and Diptera on cotton, soya beans, maize, vines, fruit, vegetables, and many other crops, at 200-1000 g/ha; seed treatment rates are 2500-10 000 g/tonne. Also used as a molluscicide for control of slugs in cereals and oilseed rape.


ANALYSIS

Product analysis by hplc (CIPAC Handbook, 1998, H, 279; AOAC Methods, 17th Ed., 997.14). Residues determined by glc of a derivative (Pestic. Anal. Man., II, 201J; Pestic. Reg. Sec.,180.407) or by hplc. Details available from Bayer CropScience.


MAMMALIAN TOXICOLOGY

Reviews FAO/WHO 89, 91 (see part 2 of the Bibliography). Oral Acute oral LD50 for rats 66 (in water), 120 (in corn oil), dogs >800, monkeys >467 mg/kg. Skin and eye Acute percutaneous LD50 for rabbits >2000 mg/kg; slightly irritating to their eyes and skin. Inhalation LC50 (4 h) for rats 0.32 mg/l air. NOEL (2 y) for rats 3.75 mg/kg daily, for mice 5.0 mg/kg daily. ADI (JMPR) 0.03 mg/kg b.w. [2000]. Toxicity class WHO (a.i.) II; EPA (formulation) II EC classification T+; R25, R26| N; R50


ECOTOXICOLOGY

Birds Acute oral LD50 for Japanese quail 2023 mg/kg. Dietary LC50 for mallard ducks 5620 mg/kg diet. Fish LC50 (96 h) for bluegill sunfish 1.4, rainbow trout >3.3 mg/l. Daphnia LC50 (48 h) 0.027 mg/l. Bees Moderately toxic to bees exposed to direct spray. No hazard to honeybees after spray residues have dried.


ENVIRONMENTAL FATE

EHC 64 (WHO, 1986; a review of carbamate insecticides in general). Animals In rats, rapidly degraded to methomyl, which was rapidly converted to methomyl methylol, oxime, sulfoxide and sulfoxide oxime. These unstable intermediates were converted to acetonitrile and CO2, which were eliminated primarily by respiration and in the urine; a small fraction of acetonitrile was further degraded to acetamide, acetic acid and CO2 (K. Huhtanen & H. W. Dorough, Pestic. Biochem. Physiol., 1976, 6, 571-583). Plants Major metabolites include thiodicarb methomyl, acetonitrile and CO2. Soil/Environment Rapidly degraded in soils of various types, under both aerobic and anaerobic conditions, by hydrolysis and photolysis. The primary degradation products are methomyl and methomyl oxime. DT50 of thiodicarb in soil is 3-8 d, depending upon the soil type.


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