_Emulsum Petrolati (Emul. Petrolat.), Emulsion of Petrolatum, N.F._ (Emulsum Petrolei, N.F. III).--Petrolatum (22.5%), expressed oil of almond and acacia in syrup and water flavored with tincture of lemon peel. USES: Emollient laxative. DOSAGE: 15 Cc. or 4 fluidrachms (N.F.). =Petrolatum Album (Petrolat. Alb.), White Petrolatum, U.S.P.= (White Petroleum Jelly).--Petrolatum decolorized or nearly so. ACTION AND USES: Same as those of petrolatum. _*Petrolatum Liquidum (Petrolat. Liq.), Liquid Petrolatum, U.S.P._ (Liquid Paraffin, Mineral Oil).--A mixture of liquid hydrocarbons. Official as Heavy Liquid Petrolatum and Light Liquid Petrolatum. A colorless, transparent, oily, nearly odorless and nearly tasteless liquid. Insoluble in water or alcohol. ACTION AND USES: Vehicle for medicinal agents to be applied externally or to the mucous membranes of the nose and throat. Also given internally largely for its mechanical action in constipation. Is not absorbed by the intestine and has no nutritive properties. DOSAGE: 15 Cc. or 4 fluidrachms (U.S.P.). _Nebula Aromatica (Nebul. Arom.), Aromatic Oil Spray, N.F._ (Aromatol).--Light liquid petrolatum aromatized with phenol, menthol, thymol, camphor, benzoic acid, eucalyptol, oil of cinnamon, oil of clove and methyl salicylate. USES: An aromatic spray. _Petroxolinum Liquidum (Petrox. Liq.), Liquid Petroxolin, N.F._ (Petrolatum Saponatum Liquidum, N.F. III, Liquid Petrox).--Light liquid petrolatum and ammonium oleate, scented with oil of lavender and diluted with water and alcohol. USES: A soap-emulsion of petrolatum intended as vehicle for oily applications. _Petroxolinum Spissum (Petrox. Spiss.), Solid Petroxolin, N.F._ (Petrolatum Saponatum Spissum, N.F. III, Solid Petrox).--An ointment composed of ammonium oleate, white wax, light liquid petrolatum and alcohol scented with oil of lavender. =Petroselini Radix (Petrosel. Rad.), Parsley Root, N.F.= ACTION AND USES: Obsolete carminative. DOSAGE: 2 Gm. or 30 grains (N.F.). _Fluidextractum Petroselini Radicis (Fldext. Petrosel. Rad.), Fluidextract of Parsley Root, N.F._--Parsley root (100%). Absolute alcohol content about 55 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.). =Petroselinum (Petrosel.), Parsley Fruit, U.S.P.= (Parsley Seed). ACTION AND USES: See the oleoresin below. _Oleoresina Petroselini (Oleores. Petrosel.), Oleoresin of Parsley Fruit, U.S.P._ (Liquid Apiol). USES: Advertised as an emmenagogue, but of doubtful value. DOSAGE: 0.5 Cc. or 8 minims (U.S.P.). =PETROXOLINA, PETROXOLINS.=--The petroxolins are solutions or suspensions of active medicaments in a mixture of ammonia soap and petrolatum or liquid petrolatum. Their advantage over other forms of external applications is doubtful. For official petroxolins see under the names of the principal ingredients. =*Phenol (Phenol), Phenol, U.S.P.= (Carbolic Acid).--Hydroxybenzene obtained from coal-tar or made synthetically.