Acifluorfen

Structural formula
General
Surname	Acifluorfen
other names	5- [2-chloro-4- (trifluoromethyl) phenoxy] -2-nitrobenzoic acid ( IUPAC )
Molecular formula	C 14 H 7 ClF 3 NO 5
Brief description	yellow-brown solid
External identifiers / databases
CAS number 50594-66-6 EC number 256-634-5 ECHA InfoCard 100.051.468 PubChem 44073 ChemSpider 40113 DrugBank DB07338 Wikidata Q2103461
properties
Molar mass	361.66 g mol −1
Physical state	firmly
Melting point	151.5-157 ° C
solubility	very heavy in water (120 mg l −1 at 23 ° C)
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 302-315-318-410 P: 273-280-305 + 351 + 338-501
Toxicological data	1370 mg kg −1 (LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Acifluorfen is an active ingredient in crop protection and belongs to the class of phenol ether herbicides . It is a tan solid.

history

Acifluorfen was developed by Mobil Chem. Co. (now Bayer CropScience ) and Rohm & Haas (now BASF AG ) in the mid-1970s and launched on the market in 1980.

effect

Acifluorfen is a selective herbicide . It attacks as protoporphyrinogen - inhibitor in the photosynthesis of the treated plants and inhibits these. This is activated by the influence of light. After the photoelectric transport has been influenced, a membrane -liquid- oxidation follows , during which a lightening of the pigment can be observed. Since the damage caused by the inhibition of photosynthesis is severe, the treated plant dies.

use

It is mainly used against weeds and grass weeds in soybean, cotton and peanut cultivation. Acifluorfen is mostly used as the sodium salt .

Environmental aspects

Acifluorfen is not harmful to bees, but is poisonous for fish. The degradation takes place through photolytic decay with a half-life of 30 to 80 days.

proof

Residues can be determined in plants and soils using the GC or HPLC method .

Individual evidence

1. ↑ ^{a b c d e f g h} Entry on Acifluorfen. In: Römpp Online . Georg Thieme Verlag, accessed on June 30, 2020.
2. ↑ ^{a b c d} Entry on acifluorfen in the GESTIS substance database of the IFA , accessed on June 30, 2020(JavaScript required) .
3. ↑ External identifiers or database links for acifluorfen sodium : CAS number: 62476-59-9, EC number: 263-560-7, ECHA InfoCard: 100.057.764 , GESTIS substance database : 149516 , PubChem : 44072 , ChemSpider : 40112 , Wikidata : Q27264899 .