Paraldehyde | Wikipedia audio article
Channel: wikipedia tts
Date: 27/10/2018

This is an audio version of the Wikipedia Article:
Paraldehyde

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SUMMARY
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Paraldehyde is the cyclic trimer of acetaldehyde molecules. Formally, it is a derivative of 1,3,5-trioxane. The corresponding tetramer is metaldehyde. A colourless liquid, it is sparingly soluble in water and highly soluble in ethanol. Paraldehyde slowly oxidizes in air, turning brown and producing an odour of acetic acid. It quickly reacts with most plastics and rubber.
Paraldehyde was first observed in 1835 by the German chemist Justus Liebig; its empirical formula was determined in 1838 by Liebig's student Hermann Fehling.  Paraldehyde was first synthesized in 1848 by the German chemist Valentin Hermann Weidenbusch (1821–1893), another student of Liebig; he obtained paraldehyde by treating acetaldehyde with acid (either sulfuric or nitric acid). It has uses in industry and medicine.