Butyl hydroxyl toluene

Owen (USA) 1992 Investigation of a potentially increased occurrence of colorectal cancer among employees in a polypropylene unit using available industrial hygiene data, records, work histories, and employee recollections Butylated hydroxyl toluene, xylene, calcium stearate, methanol, sodium hydroxide High, medium, low, none... 

BHT 2,6-Di-tert-butyl-p-cresol (or butylated hydroxyl toluene)... 

PP Bottle screw-caps, drinking straws Possible contaminants migrating butylated hydroxyl toluene (BHT), various stabilisers... 

Vigerust and co-workers [1] used multivariate calibration methods to establish a new method for measurement of three additives in low-density polyethylene (LDPE). The determination of the concentrations of silica, erucamide and butylated hydroxyl toluene (BHT) is based on infrared spectroscopy and a calibration model compared to traditional methods - this method is both time- and cost-effective and is more precise. 

SFE chromatography has also been used in the determination of erucamide and antioxidants in polyethylene (PE) [22], butylated hydroxyl toluene, Isonox 129 and Irganox 1010 in PE [23], and PP [23], antioxidants and UV stabilisers in food packages [24] and secondary antioxidants such as distearyl thiodipropionate and phosphonites in polyolefins [25],... 

Figure 6.9 GC-MS chromatograms of (a) virgin poloxamer 407, (b) butylated hydroxyl toluene poloxamer thermoxidised for 21 days, (c) poloxamer thermoxidised for 24 days. Reproduced with permission from G. Gallet, S. Carroccio, R Rizzarelli and S. Karlsson, Polymer, 2002, 43, 1081. 2002,...

Aromatic alcohols are called phenols. The simplest phenol, also called phenol, forms when a hydroxyl group replaces a hydrogen atom in the benzene ring. Phenol (carbolic acid) was used as an antiseptic in the 1800s. Today other phenol derivatives are used in antiseptic mouthwashes and in cleaning disinfectants such as Lysol. Phenols are easily oxidized, and this makes them ideal substances to use as antioxidants. By adding phenols such as BHT (butylated hydroxy toluene) and BHA (butylated hydroxy anisole) to food, the phenols oxidize rather than the food. 

Phenols are compounds in which the hydroxyl group is attached to a benzene ring (Figure 13.4). Like alcohols, they are polar compounds because of the polar hydroxyl group. Thus the simpler phenols are somewhat soluble in water. They are found in flavorings and fragrances (mint and savory) and are used as preservatives (butylated hydroxy toluene, BHT). Examples include ... 

Scheme 3 (a) Hg(C104)2, CaCOs, THF/H2O (b) toluene, butylated hydroxyl benzene (e)... 

Soares, D. G., A. C. Andreazza, and M. Salvador. 2003. Sequestering ability of butylated hydroxy toluene, propyl gallate, resveratrol, and vitamins C and E against ABTS, DPPFF, and hydroxyl free radicals in chemical and biological systems. J. Agric. Food Chem. 51 1077-1080. 

BHT Dibutyl hydroxyl toluene 4-Methyl-2,6-ditert-butyl-pheno 128-37-0... 

The first reactions concerned (Simons and Archer, 27) alkylation of benzene with propylene to form isopropylbenzene, with isobutene to form f-butylbenzene and di-f-butylbenzene, and trimethylethylene to form amylbenzene. Later on (Simons and Archer, 28) studied these and other reactions in more detail and showed that high yields could be obtained and that the product was not contaminated with tars or other obnoxious impurities. It was shown that the products obtained with trimethylethylene were mono- and di-f-amylbenzene, that phenyl-pentane resulted from the use of pentene-2, and that cyclohexene produced cyclohexylbenzene. Cinnamic acid reacted with benzene (Simons and Archer, 29) to form /3-phenylpropionic acid and allyl benzene reacted with benzene to form 1,2-diphenylpropane. It is interesting to note that although allyl alcohol reacted with benzene to form 1,2-diphenylpropane, the intermediate in the reaction, allylbenzene, was isolated and identified. This shows that in this case the hydroxyl reacted at a more rapid rate than the double bond. Both di- and triisobutylene reacted with phenol (Simons and Archer, 30) at 0°, when using hydrogen fluoride containing only relatively small quantities of water, to form f-butyl-benzene, but diisobutylene with 70% hydrogen fluoride produced p-f-octylphenol. Cyclohexene reacted with toluene to form cyclohexyl-toluene and octene-1 rapidly reacted with toluene to form 2-octyltoluene (Simons and Basler, 31). 

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