AROMATIC SULPHURIC ACID 247 



Derivation. — Sulphuric acid, 100 Co. ; tincture of ginger, 50 Cc. ; 

 oil of cinnamon, 1 Cc; alcohol to make 1,000 Cc. (U. S. P.) 



Properties. — Aromatic sulphuric acid contains about 20 per cent., 

 by weight, of official sulphuric acid, partly in form of ethyl sulphuric 

 acid. Spec. gr. about 0.939. (U. S. P.) 



Dose.— H., 3ss.-i. (2.-4.); C, 3 i.-ii. (4.-8.); Sh., mxv.-xxx. (1.-2.); 

 Sw. & D., mv.-xv. (.3-1.). 



AciDUM NiTRicuM. Nitric Acid. HNO3. (U.S.&B.P.) 



Synonym. — Acide azotique, Fr.; salpetersaure, G. 



A liquid composed of 68 per cent., by weight, of abso- 

 lute nitric acid, and 32 per cent, of water. 



Derivation. — Seven parts of sodium or potassium nitrate 

 are distilled with four parts of sulphuric acid and water. 

 KNO3 -H H,SO, = KHSO, + HNO3. 



Properties. — A colorless, fuming liquid, very caustic and 

 corrosive, and having a peculiar, somewhat suffocating odor. 

 Spec. gr. about 1.414. (U. S. P.) 



Incompatibles.— Alkalies and carbonates, iron sulphate, 

 lead acetate and alcohol. 



PREPARATIONS. 



ACIDUM NiTRICUM DiLUTUM, ACIDUM NiTROHYDROCHLORICUM, 

 ACIDUM NiTROHYDROCHLORICUM DiLUTUM. 



J. Acidum Nitricum Dilutum, Diluted Nitric Acid. (U. S. & B. P.) 



Derivation. — Nitric acid, 100; distilled water, 580. Diluted nitric 

 acid contains 10 per cent. , by weight, of absolute nitric acid. Spec. gr. 

 about 1.057. (U. S. P.) 



Dose.— H., 3 i.-ii. (4-8.); C, 3 ii.-iv. (8.-15.); Sh., 3 ss.-i. (2.-4.); 

 Sw. & D., nv.-xxx. (.3-2.). 



II. Acidum Nitrohydrochlorieum. Nitrohydrochloric Acid. (U. S. P.) 

 (Nitromuriatic Acid.) 



Derivation. — Nitric acid, 180; hydrochloric acid, 820. Chemical 

 composition uncertain. 



Properties. — A golden yellow, fuming and very corrosive liquid, 

 having a strong odor of chlorine. The strong acid should always be 

 freshly prepared and should be used in preference to the diluted acid. 

 It may be made off hand by mixing 4 parts of nitric acid with 16 parts 



