84 Report of Schimmel § Co. April/ October 1917. 



Eucalyptole (Eucalyptolum) . Colourless; boiling point 176 to 177°; congelation 

 point about 0°; di 5 o 0.928 to 0.930; « D + 0°; very little soluble in water, mixes with 

 alcohol, ether, chloroform, and fatty oils; equal volumes of eucalyptole and liquid paraffin 

 ought to give a perfectly transparent mixture. 



Eugenol (Eugenolum). Light-yellow, getting brown on exposure to the air; di 5O 1.071 

 to 1.074; « D + 0°; soluble in two parts of dilute alcohol; 1 gram of eugenol ought to 

 give, with 26 ccm. of water and 4 ccm. of caustic soda, a clear liquid which becomes 

 slightly turbid on exposure to the air; identifiable by adding ferric chloride. 



Helenine (Heleninum album). Colourless, needle-shaped crystals, almost insoluble 

 in water, easily soluble in alcohol and ether. Melting point 72 to 73°; combustion- 

 residue at the utmost 1 percent; the alcoholic solution (1 + 24) must not redden wet 

 litmus paper; 5 ccm. of .this solution must not become blue or green on addition of 

 one drop of ferric chlorfde solution, nor may they be rendered turbid by adding one 

 drop of iodine-potassium iodide solution. 



Heliotropine (Heliotropinum) . Colourless, glistening crystals, hardly soluble in 

 water, but easily in alcohol and ether. Melting point 37 01 ); combustion-residue at 

 the utmost 0.1 percent; 0.1 gram, of heliotropine ought to give with 2 ccm. of sulphuric 

 accid a lemon-coloured liquid, by no means a brown-coloured one. 5 ccm. of an 

 alcoholic solution (1 -j- 24) ought to give a pure yellow colour on adding one drop of 

 ferric chloride solution; test for absence of acetanilide. 



x ) According to our own observations, this compound melts between 35 and 36°. , 



Marjoram Oil (Oleum Majorance). Yellow to yellowish green; di 5 o 0.890 to 0.910; 

 « D + 5 to -j-18 01 ). 



i) The upper limit is +19°. 



Menthyl valerate (Mentholum valerianicwm),Validol. A solution of about one part 

 of menthol in two parts of menthykso valerate 1 ). Colourless; d i5 o 0.902 to 0.908; scarcely 

 soluble in water, easily in alcohol, ether, and chloroform. Proofs of identity, test for 

 free valeric and hydrochloric acids. 0.2 gram, of menthyl valerate must completely 

 volatilise on the water-bath. Ester value, 155 to 170 (for the purpose of saponification 

 2 gram, of ester are heated with 30 ccm. of semi-normal caustic potash 5 hours on 

 a wire net, so that the mixture boils briskly) 2 ). 



x ) Our own preparation does not consist of the above-mentioned mixture, but is in fact the pure ester. 

 2 ) Concerning the saponification of menthyl valerate, vide page 89 of this Report. 



Methyl salicylate (Methylum salicylicum). Colourless or slightly yellow; boiling 

 point 218 to 221 01 ); d 15 o 1.182 to 1.189 2 ); little soluble in water, very easily in alcohol and 

 ether, mixes with fatty and essential oils; proof of identity by means of ferric chloride. 



x ) The boiling point occasionally rises to 222 to 223°. 

 *) The specific gravity lies between 1.185 and 1.190. 



Neroli Oil (Oleum Aurantii Florum). Yellowish to brownish; d 15 o 0.870 to 0.880 x ); 

 soluble in 1 to 2 vols, of alcohol; the solution shows a violet-blue fluorescence 2 ). 



*) The upper limit ought to be extended to 0.881. 



8 ) The ratio of solubility mentioned holds good already for alcohol of 80 per cent, by volume. 



Orange Oil, bitter (Oleum Aurantii Corticis). Yellow to brownish; di 5 o 0.852 to 

 0.857; « D + 88 to -f 98 01 ). 



x ) The rotation only reaches -\- 98° in the case of sweet orange oil, in the case of the bitter compound 

 it only reaches -f 94°. 



