BOEIO ACID 273 



Sulphuric acid is utilized in acute lead poisoning, as an 

 antidote, to form insoluble sulphates in the bowels. The 

 acids are given for their remote astringent action in arrest- 

 ing or preventing haemorrhage (purpura) from internal 

 organs, and in diminishing excessive sweating and mucous 

 discharges ; but are inferior to other agents in the treatment 

 of these conditions. 



Administration. — The acids should all be thoroughly 

 diluted with water for internal use. 



AoiDUM BoRicuM. Boric Acid. H, B O3. (U. S. & B. P.) 



Synonym. — Boracic acid, E.; acide borique, Fr.; acidum 

 boracicum, sal. sedativum Hombergii, borsaure, G. 



Derivation. — Made by evaporation and crystallization of 

 solutions obtained by passing steam issuing from rocks in 

 volcanic regions of Italy, through water ; or by the action 

 of hydrochloric or sulphuric acids upon borax. Na^ B^O, 

 (borax) + 10 H,0 + 2 H CI = 4 H^B O3 + 2 Na CI + 5 HA 

 Eecovered by filtration and recrystallization. 



Properties. — Transparent, colorless scales, of a some- 

 what pearly lustre, or, when in perfect crystals, six-sided 

 triclinic plates, slightly unctuous to the touch ; odorless, 

 having a faintly bitterish taste, and permanent in the air. 

 Soluble in 25.6 parts of water and in 15 parts of alcohol; 

 also soluble in 10 parts of glycerin. It is feebly acid. 



Dose. — Foals and calves., gr.xx.-xxx. (1.3-2.). 



PREPARATION. 



Olyeeritum Boroglyeerini. Glycerite of Boroglycerin. (U. S. P.) 



iS2/Mon2/m.— Glycerinum acidi borici, B. P.; glycerite of glyceryl 

 borate, solution of boroglyceride. Boric acid, 310 ; glycerin to make 

 1,000. Solution prepared by heat (302° F.) 



Unguentum Acidi Borici. (10 per cent.) (U. S. & B. P.) 



SoDii Boras. Sodium Borate. Na^B.Oi- (U. So P.) 

 Synonym. — Borax, B.P.; natrum biboricum, boras, boraa 

 sodicus, E.J borate de soudre, Fr.; borsaures natron, G. 



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