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The nitrophenyl ethers are a well-known class of herbicides, the oldest member of which was nitrofen, invented by Rohm & Haas and first registered for sale in 1964. [7] This area of chemistry became very competitive, with the Mobil Oil Corporation's filing in 1969 and grant in 1974 of a patent to the structural analog with a COOCH 3 group ...
The use of DCPA as a herbicide was first described in a patent filed in 1958. [12] The material was prepared as had been described in a 1948 research paper by treating terephthaloyl chloride with chlorine to give tetrachloroterephthaloyl chloride which was then esterified with methanol. [13] C 6 H 4 (COCl) 2 + 4 Cl 2 + Fe (cat.) → C 6 Cl 4 ...
Herbicide safeners are organic compounds used to enhance the effectiveness of herbicides, to make them "safer".They minimize the effect of the herbicide on crop plants, thereby improving selectivity between crop plants vs. weed species being targeted by the herbicide.
Sulfentrazone is the ISO common name [3] for an organic compound used as a broad-spectrum herbicide. It acts by inhibiting the enzyme protoporphyrinogen oxidase . [ 4 ] It was first marketed in the US in 1997 by FMC Corporation with the brand name Authority.
Metolachlor is a popular herbicide in the United States. [3] As originally formulated metolachlor was applied as a racemate , a 1:1 mixture of the ( S )- and ( R )-stereoisomers. The ( R )-enantiomer is less active, and modern production methods afford a higher concentration of S-metolachlor, thus current application rates are far lower than ...
Trifluralin is a common pre-emergent selective herbicide, a dinitroaniline.With about 14 million pounds (6,400 t) used in the United States in 2001, [3] and 3–7 million pounds (1,400–3,200 t) in 2012, [4] it is one of the most widely used herbicides.
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