Agrochemical Biological Pesticide, Herbicide Bensulfuron methyl 95%TC 10%WP 60%WP 60%WDG 75%WDG 83055-99-6 CAS NO.83055-99-6

Product name

Bensulfuron methyl 95%TC 10%WP 60%WP 60%WDG 75%WDG

 General info

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]

 Properties

Composition: Tech. is 96%.

Mol. wt.: 410.4;

M.f.: C16H18N4O7S;

Form: White to pale yellow, odourless solid.

M.p.: 185-188C;

V.p.: 2.8x10-9 mPa (25C).

KOW: logP = 2.45 (pH 1.5), 0.62 (pH 7) (both at 30C).

Henry: 1.4x10-11 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, 25C). In acetone 1.38, acetonitrile 5.38, dichloromethane 11.7, ethyl acetate 1.66, hexane >0.01, xylene 0.280 (all in g/l, 20C).

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

TOXICOLOGY

MAMMALIAN TOXICOLOGY
Oral: Acuteal LD50 frats >5000, mice >10 985 mg/kg.
Skin eye: Acute percutaneous LD50 frabbits >2000 mg/kg. Non-irritant to skin eyes.
Inhalation: LC50 (4 h) frats >7.5 mg/l air.
NOEL: (2 y) frats 750 mg/kg diet. Reproduction (2-generation) NOEL in rats 7500 mg/kg diet; teratogenicity NOEL in rats 500, rabbits 300 mg/kg. Not a mutagen.
ADI: 0.2 mg/kg.
Toxicity class: WHO (a.i.) III (Table 5); EPA (formulation) IV
EC hazard: R43| N; R51, R53

ECOTOXICOLOGY
Birds: Acuteal LD50 fmallard ducks >2510 mg/kg. Dietary LC50 (8 d) fbobwhite quail, mallard ducks >5620 mg/l.
Fish: LC50 (96 h) frainbow trout bluegill sunfish >150 mg/l; LC50 (48 h) fcarp >1000 ppm.
Daphnia: LC50 (48 h) >100 mg/l.
Bees: LD50 >12.5 ug/bee.

ENVIRONMENTAL FATE
Animals: Almost completely biotransformed rapidly excreted in urine faeces of rats goats.
Plants: After uptake by rice, converted to a non-herbicidal metabolite.
Soil/Environment: DT50 4-20 w on Flanagan Keyport silt loam soils. In rice fields, DT50 in water averages 4-6 d.

Application

Biochemistry: Branched chain amino acid synthesis (ALS AHAS) inhibitor. Acts by inhibiting biosynthesis of the essential amino acids valine isoleucine, hence stopping cell division plant growth.ivity is due to rapid metabolism in the crop.
Mode of action:ive systemic herbicide, absorbed by the foliage roots, with rapid translocation to the meristematic tissues.
Uses:ive pre- post-emergence control of annual perennial weeds 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.
Formulation types: GR; WG; WP.

  Specifications         

BENSULFURON-METHYL 10% WP

  Others