Bensulfuron

The EPA has not issued HAs for any of the sulfonylurea herbicides (269) and data on the occurrence of the sulfonylurea herbicides in SW or GW are not available. Additional sulfonylurea herbicides include bensulfuron [99283-01-9] and metsulfuron, methyl [74223-64-6]. 

A solvent free, fast and environmentally friendly near infrared-based methodology was developed for the determination and quality control of 11 pesticides in commercially available formulations. This methodology was based on the direct measurement of the diffuse reflectance spectra of solid samples inside glass vials and a multivariate calibration model to determine the active principle concentration in agrochemicals. The proposed PLS model was made using 11 known commercial and 22 doped samples (11 under and 11 over dosed) for calibration and 22 different formulations as the validation set. For Buprofezin, Chlorsulfuron, Cyromazine, Daminozide, Diuron and Iprodione determination, the information in the spectral range between 1618 and 2630 nm of the reflectance spectra was employed. On the other hand, for Bensulfuron, Fenoxycarb, Metalaxyl, Procymidone and Tricyclazole determination, the first order derivative spectra in the range between 1618 and 2630 nm was used. In both cases, a linear remove correction was applied. Mean accuracy errors between 0.5 and 3.1% were obtained for the validation set. 

CASRN 99283-01-9 molecular formula C15H10N4O7S FW 410.40 Chemical/Physical. in water, bensulfuron reacted with OH radicals at a rate of 2.6 x lO VM-h at 25 °C (Armbrust, 2000). 

There are several commercially available sulfonylurea herbicides that contain a 2-pyrimidine group <2006H(68)561>. These compounds, which function by inhibition of acetolactate synthase (ALS), an enzyme involved in the early stage of branched-chain amino acid synthesis, include sulfometuron-methyl 1095, primisulfuron-methyl 1096, chlorimuron-ethyl 1097, bensulfuron-methyl 1098, ethoxysulfuron 1099, nicosulfuron 1100, and pyrazosulfuron-ethyl 1101. Related nonsulfonylureas include the sulfide pyrftalid 1102 and the ether pyriminobac-methyl 1103. 

Health and Safety Factors. Malononiirilc is usually available as a solidified melt in plastic-lined drums. Remclting has to he done carefully because spontaneous decomposition can occur at elevated temperatures, particularly above lOO C. in the presence of impurities such as alkalies, ammonium, and zinc sails. Occupational exposure to malononitrile mainly occurs by inhalation of vapors and absorption through the skin. Malononitrile has a recommended workplace exposure limn of 8 mg/m Uses. Malononitrile is extensively used in the life sciences industry The most important products ate vitamin B (thiamine) and bensulfuron-melhyl. a sulfonyl urea herbicide. Most other product uses fall under the. V-containing heterocycles. 

Si, Y., Zhou, J., Chen, H., Zhou, D., and Yue, Y. (2004). Effects of humic substances on photodegradation of bensulfuron-methyl on dry soil surfaces. Chemosphere 56, 967-972. Siesler, H. W., Ozaki,Y., Kawata, S., and Heise,H. M., editors. (2002). Near-Infrared Spectroscopy Principles, Instruments, Applications, Wilcy-VCI I, Wcinhcim. 

Wang, G., J. Yuan, K. Matsumoto, et al. 2001. Homogeneous time-resolved fluoroimmunoassay of bensulfuron-methyl by using terbium fluorescence energy transfer. Talanta 55 1119-1125. 

Benoxacor heterocyclic nitrogen, benzoxazine, amide Bensulfuron-methyl sulfonyl urea... 

Chloro methyl benzoic acid, methyl ester bensulfuron... 

Guanidine amitrole, bensulfuron, chlorimuron, flazasulfuron, nicosulfuron, pirimiphos, primisulfuron,... 

Malonic acid alloxydim, bensulfuron, brodifacoum, chlorimuron, difenacoum, difethiolone, fenclorim, flazasulfuron, flocoumafen, glufosinate, nicosulfuron, isoprothiolane, oxolinic acid, primisulfuron, pyrazosulfuron, sethoxydim, tralkoxydim Malonic acid acetamide glufonisate Malonic acid dimitrile thicyofen Maneb mancozeb... 

Methyl chloride bensulfuron, cacodylic acid, dicamba, DSMA, flazasulfuron, glufosinate, MSMA, nicosulfuron, paraquat... 

Pyrimidine (2 amino 4.6 dichloro) bensulfuron, chlorimuron, flazasulfuron, nicosulfuron, pyrazosulfuron Pyrimidine (2 amino, 4 chloro, 6 methoxy) chlorimuron Pyrimidine (2 amino 4.6 difluoro methoxy) primisulfuron... 

Thiourea benazolin, bensulfuron, bisthiosemi, carbendazim, dipropetryn, flazasulfuron, flurazole... 

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