Procuct Name:Bensulfuron-methyl 60%WDG

CAS No.: 83055-99-6

Description: 

Bensulfuron-methyl

Herbicide

HRAC  B WSSA  2; sulfonylurea

NOMENCLATURE

Common name bensulfuron-methyl

Chemical Abstracts name methyl 2-[[[[[(4,6-dimethoxypyrimidin-2-yl)-amino]carbonyl]amino]sulfonyl]methyl]benzoate 

CAS RN [83055-99-6]

EEC no. 401-340-6

PHYSICAL CHEMISTRY

Composition Tech. is 96.5%.

Mol. wt. 410.4

M.f. C16H18N4O7S

Form White to pale yellow, odourless solid.

M.p. 185-188 ºC

V.p. 2.8 ´ 10-9 mPa (25 ºC)

KOW logP = 2.45 (pH 1.5), 0.62 (pH 7) (both at 30 ºC)

Henry 1.4 ´ 10-11 Pa m3 mol-1 

S.g./density 1.41

Solubility In water 2.9 (pH 5), 12 (pH 6), 120 (pH 7), 1200 (pH 8) (all in mg/l, 25 ºC). In acetone 1.38, acetonitrile 5.38, dichloromethane 11.7, ethyl acetate 1.66, hexane >0.01, xylene 0.280 (all in g/l, 20 ºC).

Stability Aqueous solutions are most stable under slightly alkaline conditions (pH 8), and slowly degrade under acidic conditions; DT50 11 d (pH 5), 143 d (pH 7) (25 ºC).

pKa 5.2 

APPLICATIONS

Mode of action Selective systemic herbicide, absorbed by the foliage and roots, with rapid translocation to the meristematic tissues.

Uses Selective pre- and post-emergence control of annual and perennial weeds and sedges (e.g. Butomus umbellatus, Scirpus maritimus, Scirpus mucronatus, Alisma plantago-aquatica, Sparganium erectum, Cyperus spp., Typha spp., etc.) in continuously flooded rice, at 30-100 g/ha.