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Acetone (2-propanone or dimethyl ketone) is an organic compound with the formula (CH 3) 2 CO. [22] It is the simplest and smallest ketone (>C=O).It is a colorless, highly volatile, and flammable liquid with a characteristic pungent odour, very reminiscent of the smell of pear drops.
Some of the more common home remedies include: bleach, ammonia, acetone, and rubbing alcohol. The following are risks of the common removal methods: Acetone The CDC reports that repeated and prolonged exposure of the eyes to acetone has the potential to cause permanent vision problems resulting from corneal clouding. [15] Ammonia
Phase behavior Triple point: 178.5 K (−94.3 °C), ? Pa Critical point: 508 K (235 °C), 48 bar Std enthalpy change of fusion, Δ fus H o +5.7 kJ/mol Std entropy change
In the US, dimethyl carbonate was exempted under the definition of volatile organic compounds (VOCs) by the U.S. EPA in 2009. [9] Due to its classification as VOC exempt, dimethyl carbonate has grown in popularity and applications as a replacement for methyl ethyl ketone (MEK) and other solvents.
Both flasks are submerged in a dry ice/acetone cooling bath (−78 °C) the temperature of which is being monitored by a thermocouple (the wire on the left). A cooling bath or ice bath , in laboratory chemistry practice, is a liquid mixture which is used to maintain low temperatures, typically between 13 °C and −196 °C.
It is prepared by condensation of esters of trifluoroacetic acid with acetone. [2] According to an analysis by proton NMR spectroscopy, the compound exists predominantly (97% at 33 °C, neat) as the enol. For comparison under the same conditions, the percent enol for acetylacetone and hexafluoroacetylacetone are 85 and 100%, respectively. [3]
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