Callitris glauca, R. Br.1) (C Preissii, Miq.; C. Huegelii, ined.; Frenela crassivalvis, Miq.; F. canescens, Parlat.; F. Gulielmi, Parlat.) is known as white, cypress or Murray river pine. It grows over the entire Australian continent, but always at some distance from the coast.
Distilled with water vapor, the wood yields 0,82 p.c. of a volatile oil which in the crude state constitutes a semisolid mass. When pressed through cloth, the larger portion of the solids remains as a cake. The liquid portion has d16o 09854; is soluble in an equal volume of 70 p.c. alcohol, but the solution becomes turbid upon the addition of more than 3 vol.; with 80 p.c. alcohol a clear solution results at first, but this solution also becomes turbid upon the addition of more solvent. Repeated careful fractionation resulted in the separation of a fraction between 250 and 252° (d15o 9266; nD15o 1,4926; insoluble in 90 p.c. alcohol), which appears to consist chiefly of sesquiterpenes. In addition, the oil contains free acids, esters, also a phenol callitrol, characterized by color reactions. Thus, if sulphuric acid be added to a glacial acetic acid solution, a red color results. The composition of callitrol has not yet been ascertained. The solid constituent, referred to above, crystallizes from alcohol in hexagonal prisms, melts at 91°, and, as was revealed by elementary analysis, consists of guaiol, Cl5H260; [a] - 29° (in 5 p.c. alcoholic solution).
1) Baker and Smith, loc. cit. p. 63 and 118. Comp. also Roy. Soc. New South Wales, Abstract of Proceedings, August 1908, 3; Journ. Soc. chem. Industry 27 (1908), 1039.
The leaf oil, which agrees with the better pine needle oils as to odor and taste, was distilled in December with a yield of 0,532 p.c. and in March with a yield of 0,635 p.c. It had the following constants: d16, 0,8813; aD + 27,9°; nD16.1,4771; ester content (hot) 13,82 p.c, (cold) 6,26 p.c, computed as C10H17Ococh8. The freshly distilled oil is soluble in 10 vols, of 90 p.c. alcohol, the old oil frequently no longer soluble in 10 vols. In the several fractions the presence of the following substances was demonstrated: d-a-pinene (m. p. of nitrosopinene 132°), d-limonene (m. p. of tetrabromide 1160)1), dipentene, <d-bornylacetate, free d-borneol; in the saponification liquid acetic acid and probably butyric acid.