Renninum (Rennin.), Rennin, N.F.—Milk-curdling enzyme from the stomach of the calf.
Grayish-white or yellowish-white powder or yellowish grains or scales, with a characteristic, slightly saline taste and a peculiar odor. Slowly soluble in water and in diluted alcohol.
Action and Uses: For making wheys and junkets.
Resina (Resin.), Rosin, U.S.P. (Colophony).—The residue left after distilling the volatile oil from turpentine (the oleoresin).
Action and Uses: Used in the preparation of ointments and plasters. Rubefacient.
Ceratum Resinae (Cerat. Res.), Rosin Cerate, U.S.P. (Basilicon Ointment).—Rosin, yellow wax and lard.
Ceratum Resinae Compositum (Cerat. Resin. Co.), Compound Rosin Cerate, N.F. (Deshler’s Salve).—Rosin, yellow wax, prepared suet, turpentine and linseed oil.
Emplastrum Elasticum (Emp. Elast.), Rubber Plaster, U.S.P. (Rubber Adhesive Plaster).—A mixture of rubber, resins, and waxes, with a filler of an absorbent powder.
Emplastrum Resinae (Emp. Res.), Rosin Plaster, U.S.P. (Rosin Adhesive Plaster, Adhesive Plaster).—Rosin, lead plaster and yellow wax.
RESINAE, RESINS.—Resins are the residues obtained by distilling the volatile oil from oleoresins or the precipitates obtained from solutions of resins in alcohol by the addition of water. For the official resins see under the names of the principal constituents.