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Ethenone is a highly reactive gas (at standard conditions) and has a sharp irritating odour.It is only reasonably stable at low temperatures (−80 °C). It must therefore always be prepared for each use and processed immediately, otherwise a dimerization to diketene occurs or it reacts to polymers that are difficult to handle.
Ketenes are unstable and cannot be stored. In the absence of nucleophiles with which to react, ethenone dimerises to give β-lactone, a cyclic ester. If the ketene is disubstituted, the dimerisation product is a substituted cyclobutadione. For monosubstituted ketenes, the dimerisation could afford either the ester or the diketone product.
Fuel additives in the United States are regulated under section 211 of the Clean Air Act (as amended in January 1995). The Environmental Protection Agency (EPA) requires the registration of all fuel additives which are commercially distributed for use in highway motor vehicles in the United States, [8] and may require testing and ban harmful additives.
Top Tier is also available from select brands in Canada, El Salvador, Guatemala, Honduras, Mexico, Panama, and Puerto Rico. Meeting this standard allows gasoline marketers to differentiate themselves from their competition. All stations selling the brand must meet Top Tier standards before the brand is qualified.
Gas Brands To Avoid. If you see these gas stations, drive past them. Amoco or BP. Amoco and BP, following their merger in 1999, were once highly trusted gasoline spots throughout the states. While ...
The Gas Signs website shows images of many brands of gasoline on service stations, mainly in the US. The Petrol Maps website provides a comprehensive list of European brands known to have issued road maps, as well as a summary of some of the larger names not thought to have sold maps.
Gas credit cards are available as private label cards for specific gas brands or as co-branded cards issued by banks. There are also gas charge cards that aren’t part of a larger payment network ...
The white gas sold today is a similar product but is produced at refineries and has a very low benzene content, benzene being a human carcinogen. [ 5 ] Though Coleman fuel has an octane rating of 50 to 55 and a flammability similar to gasoline, it has none of the additives found in modern gasoline .