The qualitative composition of peanut oil has been quite definitely established but only one attempt to determine its quantitative composition is reported. Caldwell1 identified palmitic acid. Nobody seems to have definitely isolated and identified stearic acid. Hehner and Mitchell2 obtained from the mixed fatty acids 7 % of fatty acid crystals melting at 67°which they assumed to be stearic acid. However, Meyer and Beer3 have shown that the fatty acid crystals obtained by the Hehner and Mitchell method consist of a mixture of arachidic and lignoceric acids instead of stearic acid. Gossmann4 was the first to prove the presence of arachidic acid and Kreiling6 the first to detect lignoceric acid. Gossmann and Scheven,6 Caldwell and Gossmann,7 and Schroder8 claim to have found hypogaeic acid; however, their work has been repeated by a number of other investigators and no one has been able to confirm their statements (Schon,9 Kreiling,10 Meyer and Beer,11 Bodenstein,12 H azur a and Grussner,13 Heiduschka and Felser).14 H azur a and Grussner pointed out that peanut oil contains another unsaturated acid in addition to oleic acid, i. e., linolic acid; and Farnsteiner16 analyzed the bromine addition products of the unsaturated acids and calculated the amount of linolic acid as about 6% of the total fatty acids. Finally, Heiduschka and Felser16 made an investigation of the quantitative composition of the fatty acids and report the following results: lignoceric acid, 1.9%; arachidic acid, 2.3%; stearic acid, 4.5%; palmitic acid, 4.0%; oleic acid, 79.9%; linolic acid 7.4%.Our knowledge of the general character of peanut oil led us to doubt the
Results of an investigation made in 1929 on the oil expressed from combined samples of stillingia seed from California, Florida and Texas are given, along with those recently obtained from an imported sample of stillingia oil. The American oil gave an iodine number of 176.1, a saponification value of 211.7, and a thiocyanogen value of 102.7, and was found to contain the following percentages of acids: Oleic 7.7, linoleic 56.3, linolenic 24.6, palmitic 4.42, stearic 1.43 and arachidic acid 0.34. The sample of Chinese oil gave an iodine number of 169.0, a saponification value of 206.2, and a thiocyanogen value of 100.7, and was found to contain the following percentages of acids: Oleic 10.4, linoleic 49.9, linolenic 25.4, palmitic 5.89, stearic 2.64 and arachidic acid 0.14. From the characteristics and composition of these samples, it would appear that stillingia is suitable for use in the manufacture of paints and varnishes.
The substance prepared and described by Otto was not pure methyl-Pure methylmercuric acetate has been prepared by four differentThe parent base of the methylmercuric salts has been isolated. Methylmercuric acetate is found to be one of the products formed by the thermal decomposition of mercurous acetate in an atmosphere of nitrogen.
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