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.).

King's American Dispensatory, 1898, was written by Harvey Wickes Felter, M.D., and John Uri Lloyd, Phr. M., Ph. D.