Structure:
Molecular formula: C15H17N5O6S
Molecular weight: 395.39
Melting point : 141°C
Density: 1.4143 (rough estimate)
Vapor pressure: 1.24 at pH 7 (25 ° C)
Refractive index: 1.6460 (estimate)
Storage conditions: 0-6°C
Appearance: white solid
Toxicity: acute oral LD50>5000mg / kg in female and male rats; Acute percutaneous LD50>5000mg/kg in rats and >2000mg/kg in rabbits; Acute inhalation of LC50 > 5mg/L (4h) in rats. Mild irritation to the eyes, but the symptoms disappeared within 24 hours; No skin irritation; No allergy to guinea pig skin. Micronucleus test showed that tribenuron methyl had no mutagenic chemical book effect on somatic cells; Testicular chromosome aberration test showed that tribenuron methyl had no genotoxic effect on germ cells; No teratogenicity was found in rats. Rainbow trout LC50>1000mg/L(96h), Daphnia lc50720mg/L(48h). The acute oral LD50 of quail is more than 2250mg/kg. The LD50 of bee is more than 0.1mg/animal, and the LC50 of earthworm is more than 1200mg / kg soil.
Uses: For weeding. The mechanism is selective internal absorption of conductive herbicides, which can be absorbed by the roots and leaves of weeds and transmitted in the plant. It affects the biosynthesis of branched chain amino acids (such as leucine, isoleucine, valine, etc.) by inhibiting the activity of acetyllactate synthase (ALS).