Extractum Rosae Fluidum (U. S. P.)—Fluid Extract of Rose.
SYNONYM: Fluid extract of red rose.
Preparation.—"Red rose, in No. 30 powder, one thousand grammes (1000 Gm.) [2 lbs. av., 3 ozs., 120 grs.]; glycerin, one hundred cubic centimeters (100 Cc.) [3 fl℥, 182♏]; diluted alcohol, a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Mix the glycerin with nine hundred cubic centimeters (900 Cc.) [30 fl℥, 208♏] of diluted alcohol, and, having moistened the powder with four hundred cubic centimeters (400 Cc.) [13 fl℥, 252♏] of the mixture, pack it firmly in a cylindrical glass percolator; then add enough menstruum to saturate the powder and leave a stratum above it. When the liquid begins to drop from the percolator, close the lower orifice, and, having closely covered the percolator, macerate for 48 hours. Then allow the percolation to proceed, gradually adding, first, the remainder of the menstruum, and afterward diluted alcohol, until the red rose is exhausted. Reserve the first seven hundred and fifty cubic centimeters (750 Cc.) [25 fl℥, 173♏] of the percolate, and evaporate the remainder in a porcelain capsule, at a temperature not exceeding 50° C. (122° F.), to a soft extract; dissolve this in the reserved portion, and add enough diluted alcohol to make the fluid extract measure one thousand cubic centimeters (1000 Cc.) [ 33 fl℥, 391♏]"—(U. S. P.).
Description, Medical Uses, and Dosage.—This fluid has a deep-red color, and the odor of rose. To the taste it is pleasantly subastringent. It may be added to mouth washes and gargles, and employed to disguise the taste of magnesium and sodium sulphates, etc. Dose, 30 minims to 2 fluid drachms