The oil of the seeds of Nigella sativa, L. (Ger. Schwarz-kiimmel, family Ranunculaceae) (yield 1,4 p.c.) is yellow in color, does not fluoresce and has an unpleasant odor. d15o 0,875 to 0,877; aD+1o26'to + 2o20; nD20o 1,48364 to 1,48441; A.V. 0 to 0,5; E. V. 1 to 6; E. V. after acetylation 15 to 25; soluble in 4,5 and more vol. of 90 p.c. alcohol. It boils between 170 and 260°2).