Bentazone

Bentazone

灭草松

3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide

3-(1-methylethyl)-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide

25057-89-0

C₁₀H₁₂N₂O₃S

Herbicides > Unclassified herbicides

Herbicide

Thifensulfuron-methyl+bentazone+flumetsulam
Penoxsulam+Bentazone
Imazamox+Bentazone
Cyhalofop-butyl+Pyribenzoxim+Bentazone
Bispyribac-sodium+Bentazone
Bentazone+Quinclorac
Bentazone+carfentrazone-ethyl
Acifluorfen+Bentazone
Soluble concentrate (sodium salt), soluble granules. Premix Parters: clomazone; cumyluron thenylchlor;

Molecular weight:240.3; Physical form:Colourless crystals. Density:1.41 (20 °C); Composition:?/SYM>96% pure. Melting point:139.4-141 °C; Vapour pressure:0.17 (20 °C); Henry constant:7.167 ?/SYM> 10-5 Pa m3 mol-1 (); Partition coefficient(n-octanol and water):logP = 0.77 ( 5), -0.46 ( 7), -0.55 ( 9); pKa:3.3 (24 °C); Solubility:In water 570 /l ( 7, 20 °C). In acetone 1387, methanol 1061, ethyl acetate 582, dichloromethane 206, n-heptane 0.5 ?/SYM> 10-3 (all in g/l, 20 °C).; Stability:Very resistant to hydrolysis in both acidic and alkaline media. Decomposed by sunlight.;

Oral:Acute oral 50 for rats >1000, dogs >500, rabbits 750, cats 500 /. Percutaneous:Acute percutaneous 50 for rats >2500 /kg. Moderately irritating to skin and eyes (rabbits). Inhalation:50 (4 h) for rats >5.1 /l air. ADI:() 0.1 /

Ecotoxicology: 
Algae:50 (72 h) for green algae (Ankistrodesmus) 47.3 /l.Bees:Not toxic to bees; 50 (oral) >100 mg/bee.Birds:Acute oral 50 for bobwhite quail 1140 /kg. Dietary 50 for bobwhite quail and mallard ducks >5000 .Daphnia:50 (48 h) 125 /l.Fish:50 (96 h) for rainbow trout and bluegill sunfish >100 /l.Worms:50 (14 d) >1000 / soil. 

Environmental fate: 
Animals:Metabolism studies in three different species showed that bentazone was only poorly metabolised, the parent compound being the predominant product. Only small amounts of hydroxylated bentazone metabolites could be detected. No conjugated products were fouSoil:In soil, short-lived hydroxy compounds are first formed, which rapidly undergo further degradation (R. Huber & S. Otto in Rev. Environ. Contam. Toxicol., 137, 111-134). In sunlight, bentazone undergoes rapid degradation, ultimatePlant:In plants, rapidly metabolised to derivatives of anthranilic acid, the principal metabolites being the 6- and 8-hydroxy derivatives, which are conjugated to sugars, forming glycosides.

Signal Word:CAUTION; 
Hazard Class:III(Slightly hazardous)