When heated with hydrochloric acid to Ioo C. it yields carbon dioxide and pyrotartaric acid, C 5 H 8 0 4, and when warmed with dilute sulphuric acid to 150° C. it gives carbon dioxide and acetaldehyde.
Grignard (Comptes Rendus, 1900 et seq.) showed that aldehydes combine with magnesium alkyl iodides (in absolute ether solution) to form addition products, which are decomposed by water with the formation of secondary alcohols, thus from acetaldehyde and magnesium methyl iodide, isopropyl alcohol is
CH3�CHO+CH3MgI->CH3�CH?Mg H2 /C1.3 The lower members of the aliphatic series are characterized by their power of polymerization (see Formalin, and the account of Acetaldehyde below), and also by the so-called aldol condensation, acetaldehyde in this way forming aldol, CH 3 �[[Chohï
It is readily soluble in water, melts at 193° C., and is decomposed at a higher temperature into chromium sesquioxide and oxygen; it is a very powerful oxidizing agent, acting violently on alcohol, converting it into acetaldehyde, and in glacial acetic acid solution converting naphthalene and ant
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