Tinctura Aurantii Dulcis (U. S. P.)—Tincture of Sweet Orange Peel.
Related entry: Aurantii Dulcis Cortex (U. S. P.)—Sweet Orange Peel
(Modern shorthand: 1:5 91 %)
Preparation.—"Sweet orange peel, taken from the fresh fruit, two hundred grammes (200 Gm.) [7 ozs. av., 24 grs.]; alcohol, a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Mix the orange peel (which should be as free as possible from the inner, white layer), previously cut into small pieces, with eight hundred cubic centimeters (800 Cc.) [27 fl℥, 25♏] of alcohol, and macerate for 24 hours; then pack it moderately in a conical percolator, and gradually pour alcohol upon it, until one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏] of tincture are obtained"—(U. S. P.). This tincture has a golden color and fine aroma. The fresh peel may be grated, avoiding the white portion, or it may be carefully peeled off with a sharp knife.
Uses.—Employed exclusively as a flavoring agent.