PE EE I nae Oe 
48 REPORT OF SCHIMMEL &§ Co. OCTOBER 1915. 
lemon oil between A. H. Bennett, H. E. Burgess and R. Doumin [Perfuwm. Record 5 (1914), 440; 6 (1915), 30, 37]. 4 
The question was also touched upon as to how much citral remains in the terpenes when manufacturing 
terpeneless oil. According to Bennett’s observations this amounted to about 1.5 p.c., whereas Burgess considers 
0.5 p.c. to be the maximum, Doumin being unable to prove the existence of any poe parts at all in pk 
lemon oil terpenes examined by him. Apart from this, there was nothing new in the discussion. 
Oil of Lemongrass (Olewm Graminis citrati). Dark yellow’); d45.50 0.880 to 0.905; 
— 3°) to + 3°; contains not less than 70 p.c. of aldehydes (sulphite method). 
1) The colour is yellowish to reddish-brown. 
2) In Malabar oils we observed rotations down to — 5°. + ae 
Menthol (Menthol). M. p. 42 to 43°*); entirely volatilised by the heat of a water- ; 
bath; very slightly soluble in water, but readily soluble in 90 p.c. alcohol, the solutions 
being neutral to litmus. Boiled with sulphuric acid diluted with half its volume of 
water, menthol acquires an indigo-blue or ultramarine colour, the acid becoming brown. 
1) The melting point lies between 42 and 44°. 
Methyl salicylate (Methyl salicylas). Colourless; sparingly soluble in water, 
readily soluble in 90 p.c. alcohol, in glacial acetic acid and in carbon disulphide; 
b. p. 219 to 221°; disso 1.185 to 1.192; a) -+0°; ester content not less than 98 p.c.*); 
the alcoholic solution is neutral or faintly acid, the aqueous solution is coloured 
violet by the addition of one drop of ferric chloride. 
1) For the complete saponification two hour’s heating on the water-bath is required with methyl Salles, 
lest the values obtained be too low. 
Volatile Oil of Mustard (Olewm Sinapis volatile). Colourless or pale yellow; 
dis.s0 1.014 to 1.025; distils between 148 to 156°; allylisothiocyanate content not less 
than 92 p.c. 
Oil of Nutmeg (Olewm Myristicae). Colourless or pale yellow; dis.50 0.870 to 0.925; 
a +13') to + 30°; npxs0o 1.474 to 1.484; soluble in 3 parts of 90 p.c. alcohol; eva- 
poration residue not more than 5 p.c. 
1) The lower limit of value is too high, for we have observed rotations of + 7°52’ in oils distilled by — 
ourselves from the best raw material. Compare Report October 1904, 65. 
Oil of Peppermint (Olewm Menthae piperitae). Colourless, pale yellow or greenish- 
yellow; dis.50 0.900 to 0.920; #) — 20 to — 35°; soluble in 4 parts of 70 p.c. alcohol; 
total menthol not less than 50 p.c., menthyl acetate not less thar 5 p.c.'). 
1) According to our own observations, ester percentage may be as low as 4p.c. with best oils. 
Oil of Rose (Olewm Rosae). A pale yellow or yellowish-green, crystalline mass; 
semi-solid at ordinary temperatures; d=; 0.854 to 0.8621); a) —2 to - — 49%). nooo 1.456 
to 1,465; -m.-pi-20-to 23°: 
1) The lower limit of value is not correct, good Bulgarian oils have a specific gravity cote to 0.849. 
We have pointed this out on previous occasions (Report April 1910, 127). 
2) We have often observed rotations down to —1° with oils of irreproachable quality. Oils showing a 
higher rotation than — 2° 30’ should be regarded with suspicion (comp. Report April 1912, 108). 
Oil of Rosemary (Oleum Rosmarini). Colourless or pale yellow; dis.500.895 to 
0.920; a —2 to + 15°; nps:0 1.463 to 1.473; soluble in 1 part of 90 p.c. alcohol and 
in 5 to 10 parts of a mixture of equal volumes of 90 and 70 p.c. alcohol; total borneol 
at least 10 p.c.; ester (bornyl acetate) at least 1.8 p.c. ’). 
1) In Reem aanice with facts, the lowest limit for total borneol ought to be reduced to 8p.c., and ester 
down to 1 p.c. 
Oil of Sandalwood (Oleum Santali). Nearly colourless or pale yellow; dis.50 0.973 
to 0.985; %p —13 to — 219; npss0 1.498 to 1.508; soluble in 6 parts of 70 p.c. alcohol 
at 20°; total santalol (Ci;H2,O) not below 90 p.c. 
