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Chemical Identification
Common Name
Methabenzthiazuron
中文通用名
甲基苯噻隆
IUPAC
1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea; 1-benzothiazol-2-yl-1,3-dimethylurea
CAS
N-2-benzothiazolyl-N,N'-dimethylurea
CAS No.
[18691-97-9]
Molecular Formula
C10H11N3OS
Molecular Structure
Category
Activity
Herbicide
Premix
Chlorsulfuron+methabenzthiazuron
Wettable powder. 
Premix Parters: chloropicrin;
Physical Properties
Molecular weight:221.3; Physical form:Colourless, odourless crystals. Melting point:119-121 °C; Vapour pressure:5.9 × 10-3 (20 °C); 1.5 × 10-2 (25 °C); Partition coefficient(n-octanol and water):logP = 2.64; Solubility:In water 59 /l (20 °C). In acetone 115.9, methanol 65.9, dimethylformamide c. 100, dichloromethane >200, isopropanol 20-50, toluene 50-100, hexane 1-2 (all in g/l, 20 °C).; Stability:Unstable in strong acids and alkalis; 50 (22 °C) >1 y ( 4 to 9). Direct photolysis is very slow (50 >1 y); the presence of humic substances increases the rate of photodegradation;
Toxicology
Oral:Acute oral 50 for rats >5000, mice and guinea pigs >2500, rabbits, cats, and dogs >1000 /. Percutaneous:Acute percutaneous 50 for rats >5000 /kg. Not irritating to skin and eyes (rabbits). Inhalation:50 (4 h) for rats 5.12 /l air (dust). Phytotoxicity:'Tribunil' is well tolerated in crops listed, when t
Environmental Profile
Ecotoxicology: 
Bees:Not toxic to bees.Daphnia:50 (48 h) 30.6 /l.Fish:50 (96 h) for rainbow trout 15.9, golden orfe 29 /l. 

Environmental fate: 
Animals:In rats, 14C-methabenzthiazuron is rapidly metabolised and the radioactivity excreted in the urine, 97% of the dose being recovered within 48 hours. It is metabolised by a combination of side-chain hydrolysis and ring hydroxylation followed by Soil:In soil, methabenzthiazuron is strongly adsorbed. Duration of residual activity is c. 3 .Plant:In several plant species, similar metabolites were detected. The main metabolites are 1-hydroxymethyl-3-methyl-3-(benzothiazol-2-yl)urea, its glucoside and 3-methyl-3-(benzothiazol-2-yl)urea.WATER SOLUBILITY: 59 mg/l at 20° C
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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