Detailed Product Description
Common name: Sulfosulfuron
Chemical name:
N-[[(4, 6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-2-(ethylsulfonyl)imidazo[1, 2-α]pyridine-3-sulfonamide
Molecular formula: C16H18N6O7S2
Chemical class: Pytimidinysulfonylurea herbicides
CAS no.: 141776-32-1
Properties:
Form: white odorless solid
Melting point: 201.1-201.7oC
Vapor pressure: 8.81 x 10-8MPa (25oC)
Solubility in water: 17.6 (pH 5), 1,627 (pH 7), 482 (pH 9) (mg/l, 20oC)
Solubility in solvents: in acetone 0.7, methanol 0.33, ethyl acetate 1.01, dichloromethane 4.35, xylene 0.16, heptane 0.01(in g/L, 20oC)
Stability: stable <54oC for 14 days
Toxicity:
Acute oral LD50 for rats: >5,000mg/kg
Acute dermal LD50 for rats: >5,000mg/kg
Inhalation for rats LC50: practically non-toxic
Non-irritating to skin, moderately irritating to eyes
Ecotoxicology:
Effects on aquatic organisms: rainbow trout >95mg/L, carp >91mg/L, bluegill sunlight >96mg/L, sheep head minnow 101mg/L (96h), daphnia EC50 >96mg/L (48h)
Effects on bees: LD50 (contact) >30μg/bee, (dietary) >25μg/bee
Effects on birds: bobwhite quail and mallard ducks LD50 >2,250mg/kg
Effects on earthworms: LC50 >848mg/kg
Environmental fate:
The primary degradation pathway in soil is the hydrolytic cleavage of the sulfonylurea linkage to yield the corresponding sulfonamide and dimethoxypyrimidinamine. Photodegradation is also a mode of environmental dissipation
Mode of action:
Branched chain amino acid synthesis (ALS or AHAS) inhibitor
Acts by inhibiting biosynthesis of the essential amino acid valine and isoleucine, hence stopping cell division and plant growth
Selectivity derives from rapid metabolism in the crop
Metabolic basis of selectivity in sulfonylureas
Usage:
Demonstrated activity for the control of annual broad-leaved weeds and grass weeds in cereals
