Oleum Terebinthinae Rectificatum (U. S. P.)—Rectified Oil of Turpentine.
Related entry: Oleum Terebinthinae (U. S. P.)—Oil of Turpentine
Preparation.—"Oil of turpentine, a convenient quantity; lime-water, a sufficient quantity. Shake the oil thoroughly with six (6) times its volume of lime water, and introduce the mixture into a copper still connected with a well-cooled condenser. Then distill, until about three-fourths of the oil have passed over, and separate the clear oil from the water. Keep the product in well-stoppered bottles, in a cool place, protected from light"—(U. S. P.).
Description.—"A thin, colorless liquid, having the general properties mentioned under oil of turpentine (see Oleum Terebinthinae). Specific gravity, 0.855 to 0.865 at 15° C. (59° F.). Boiling point, about 160° C. (320° F.). Its alcoholic solution should be neutral to litmus paper. If about 10 Cc. of the oil be evaporated in a capsule on a water-bath, no weighable residue should be left"—(U. S. P.). "Rectified oil of turpentine. should always be dispensed when oil of turpentine is required for internal use"—(U. S. P.).