9656. Triclopyr

Nomenclature

CAS number: 55335-06-3
[(3,5,6-Trichloro-2-pyridinyl)oxy]acetic acid; Dowco 233.
C7H4Cl3NO3; mol wt 256.47.
C 32.78%, H 1.57%, Cl 41.47%, N 5.46%, O 18.71%.

Description and references

Selective post-emergence herbicide. Prepn: L. D. Markley, US 3862952 (1975 to Dow). Activity: B. C. Byrd et al., Proc. South. Weed Sci. Soc. 28, 251 (1975). Acute toxicity: E. E. Kenaga, Down Earth 35, 25 (1979).

Chemical structure

Properties

Fluffy solid, mp 148-150°. Vapor pressure at 25°: 1.26 × 106 mm Hg. pKa 2.68. Subject to photolysis. Soly in water at 25°: 440 mg/l. Soly at 25° (g/kg): acetone 989; 1-octanol 307. LD50 orally in rats: 713 mg/kg (Kenaga).

Derivative

Butoxyethyl Ester.

Nomenclature

CAS number: 64700-56-7
Garlon (Dow AgroSci.); Pathfinder (Dow AgroSci.); Remedy (Dow AgroSci.); Turflon (Dow AgroSci.).
C13H16Cl3NO4; mol wt 356.63.
C 43.78%, H 4.52%, Cl 29.82%, N 3.93%, O 17.95%.

Derivative

Triethylamine Salt.

Nomenclature

CAS number: 57213-69-1
Grandstand (Dow AgroSci.).
C7H4Cl3NO3.C6H15N; mol wt 357.66.
C 43.66%, H 5.35%, Cl 29.74%, N 7.83%, O 13.42%.

Use

Herbicide.