3,3',4,4'-Tetrachloroazobenzene and 3,3',4,4'-tetrachloroazoxybenzene in technical grade herbicides: propanil, diuron, linuron, and neburon.
The levels of 3,3',4,4'-tetrachloroazobenzene (TCAB) and 3,3',4,4'-tetrachloroazoxybenzene (TCAOB) were determined by gas chromatography-electron capture detection in 20 samples of 3,4-dichloroaniline-derived herbicides. The concentrations of TCAB in technical grade propanil, diuron, linuron, and neburon from a variety of manufacturers ranged from 0.10 to 28.40 mg/kg. No relevant difference was found between the two different herbicide classes analyzed.
D001391:Azo Compounds / Q000032:analysis*; D002722:Chlorobenzenes / Q000032:analysis*; D002849:Chromatography, Gas; D004237:Diuron / Q000032:analysis; D004340:Drug Contamination; D004563:Electrochemistry; D008401:Gas Chromatography-Mass Spectrometry; D006540:Herbicides / Q000032:analysis*; D007558:Italy; D008044:Linuron / Q000032:analysis; D010671:Phenylurea Compounds / Q000032:analysis; D011411:Propanil / Q000032:analysis
D001391:Azo Compounds; D002722:Chlorobenzenes; D006540:Herbicides; D010671:Phenylurea Compounds; D008044:Linuron; C013279:3,4,3',4'-tetrachloroazobenzene; C013280:3,4,3',4'-tetrachloroazoxybenzene; C028818:neburon; D011411:Propanil; D004237:Diuron