203 INORGANIC AGENTS 



AciDtTM SuLPHUHicuM. Sulphuric Acid. H^SO,. (U. S. & B. P.) 



Synonym.— Oil of vitriol, E.; acide sulphurique, huile de vitriol, Fr.; schwefel- 

 s^ure, vitriolol, G. 



A liquid composed of not less than 92.5 per cent, by weight of absolute sul- 

 phuric acid, and not more than 7.5 per cent, water. 



Dencatiom.— Sulphurous anhydride, generated by roasting iron pyrites, or 

 sulphur, is passed into leaden chambers. Nitric acid is introduced with Steam, 

 and the sulphurous anhydride undergoes oxidation and hydration. 2 HNOa+2 

 SOj+H.O = 2 HjSOi+NaOs. 



The nitrous acid combines with oxygen and water in the air, and is re-trans- 

 formed into the nitric acid, acting continually as a carrier of oxygen to sulphurous 

 anhydride. 



Properties.— A colorless, odorless liquid, of oily consistence, very caustic and 

 corrosive. Spec. gr. about 1.83. Miscible, in all proportions, with water and 

 alcohol, with evolution of much heat; the acid must be added with great caution 

 to the diluent. (U. S. P.) 



Incompatibles.— Alkalies and carbonates, calcium and lead salts. 



PEEPAKATIONS. 



Acidum Sulphuricum Dilutum, Acidum Sulphuricum Aromaticum. 



Acidum Sulphuricum Dilutum. Diluted Sulphuric Acid. (U. S. & B. P.) 



Derivation. — Sulphuric acid, 50; distilled water, 420. 



Properties. — Diluted sulphuric acid contains 9.5 to 10.5 per cent, of H^SO,. 

 Spec. gr. about 1.067. (U. S. P.) 



Dose.—n., 3i-ii, (4-8); C, 3ii-iv, (8-15); Sh., 3ss-i, (2-4); Sw. & D., 

 ni,x-xxx, (.6-2). 

 Acidum Sulphuricum Aromaticum. Aromatic Sulphuric Acid. (U. S. & B. P.) 



Synonym. — Tinctura aromatica acida, P. G.; elixir vltrioli Mynsichti, elixir of 

 vitriol, E.; 61ixir vitriolique, teinture (alcoolfi) aromatique sulphurique, Fr.; 

 saure aromatische tinctur, G. 



Derivation. — Sulphuric acid, 109; tincture of ginger, 50; oil of cinnamon, 1; 

 alcohol to make 1,000. (U. S. P.) 



Properties. — Aromatic sulphuric acid contains 19 to 21 per cent, of H2SO4, 

 partlv in form of ethyl sulphuric acid. Spec. gr. about 0.933. (U. S. P.) 



bose.—R., 3ss-i, (2-4); C, 3i-ii, (4-8); Sh., Tllxv-xxx (1-2); Sw. & D., 

 niv-xv, (.3-1). 



Acidum Nitmcum. Nitric Acid. HNO3. (U. S. & B. P.) 



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



An aqueous solution containing not less than 67 per cent, nor more than 69 

 per cent, of HNO3. 



Derivation. — Seven parts of sodium or potassium nitrate are distilled with 

 four parts of sulphuric acid and water. KNOj-l-HjSO, =t KHSO^-l-HNOa. 



Properties. — A fuming liquid, very caustic and corrosive; it has a peculiar, 

 somewhat suffocating odor. Spec. gr. about 1.403. (U. S. P.) 



Incompatibles. — Alkalies and carbonates, iron sulphate, lead acetate and 

 alcohol. 



PREPARATIONS. 



Acidum Nitricum Dilutum, Acidum Nitrohydrochloricum, 

 Acidum Nitrohydrochloricum Dilutum. 

 I. Acidum Nitricum Dilutum. Diluted Nitric Acid. (U. S. 1905 & B. P.) 

 Derivation.- — Nitric acid, 100; distilled water, 680. Diluted nitric acid con- 

 tains 10 per cent., by weight, of absolute nitric acid. Spec. gr. about 1.054. 

 (U. S. P.) 



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

 Tn,v-xxx, (3-2). 



//. Acidum Nitrohydrochloricum. Nitrohydrochloric Acid. (U. S. P.) 



(Nitromuriatic A cid.) 

 Synonym. — Acidum chloro-nitrosum, P. G. ; aqua regia s. regis, — acide chloro- 

 azotique s. chloro-nitreux, eau Regales, Fr.; salpetersalzsaure, konigswasser, G. 



Derivation. — Nitric acid, 18.0; hydrochloric acid, 82.0. Chemical composition 

 uncertain. 



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