Product Name

clopyralid

Function

Herbicide

Specification

95%TC, 75%WDG, 30%SL

Chemical Name

3,6-dichloro-2-pyridinecarboxylic acid  

CAS No.

1702-17-6

Empirical Formula

C6H3Cl2NO2 

Toxicology

Oral Acute oral LD50 for male rats 3738, female rats 2675 mg/kg.  Skin and eye Acute percutaneous LD50 for rabbits >2000 mg/kg; a severe eye irritant, not a skin irritant.  Inhalation LC50 (4 h) for rats >0.38 mg/l.  NOEL (2 y) for rats 15, male mice 500, female mice >2000 mg/kg b.w. daily.  ADI 0.15 mg/kg.  Other Non-carcinogenic, non-mutagenic, non-teratogenic, and produces no significant toxicological effects on reproductive parameters.  Toxicity class WHO (a.i.) U; EPA (formulation) IV  EC classification Xi; R41| N; R51, R53  

Applications

Clopyralid Mode of action Selective systemic herbicide, absorbed by the leaves and roots, with translocation both acropetally and basipetally, and accumulation in meristematic tissue. Exhibits an auxin-type reaction. Acts on cell elongation and respiration. Clopyralid Uses Post-emergence control of many annual and perennial broad-leaved weeds of the families Polygonaceae, Compositae, Leguminosae, and Umbelliferae, in sugar beet, fodder beet, oilseed rape, maize, cereals, brassicas, onions, leeks, strawberries and flax (at 70-300 g a.e./ha), and in grassland and non-crop land (at 300-560 g a.e./ha). Provides particularly good control of creeping thistle (Cirsium arvense), perennial sow-thistle, coltsfoot, mayweeds, and Polygonum spp. Phytotoxicity Good crop tolerance of graminaceous, cruciferous and chenopodiaceous crops. Clopyralid Formulation types SG; SL.