Methyl succinic acid (pyrotartaric acid), HO 2 C CH 2.
It crystallizes from water in large prisms which melt at 168-170° C., and on further heating gives an anhydride and finally chars, emitting a characteristic odour and forming pyroracemic and pyrotartaric acids.
GLUTARIC ACID, Or [[Normal Pyrotartaric Acid, Ho 2 C Ch 2 Ch 2 Ch 2 Co 2 H]], an organic acid prepared by the reduction of a-oxyglutaric acid with hydriodic acid, by reducing glutaconic acid, HO 2 C CH 2 CH: CH.
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 150Ã‚° C. it gives carbon dioxide and acetaldehyde.
The esters of the acid condense readily with aromatic aldehydes and ketones to form y-disubstituted itaconic acids and y-alkylen pyrotartaric acids (H.