HYDRARGYRI NITRAS — NITRATE OF MERCURY 433 



^ Hydrargyri lodidi Eubri 30.0 



Potassii lodidi 10.0 



Tiacturae Cantharidis q. s ad. 100.0 



M. Ft. Sol. 



Sig. Apply with cone or swab to spavin, ringbone, etc. Avoid con- 

 tact with the hands. Antiperiostin according to Frohner. 



HYDRARGYRI lODIDUM FLAVUM — YELLOW MERCUROUS 



IODIDE 



Synonyms. Protiodide of Mercury, Green Iodide of Mercury, 

 Mercurous Iodide. 



Properties. Bright yellow amorphous powder, odorless and 

 tasteless. By exposure to light it becomes greenish, as it decom- 

 poses into metallic mercury and mercuric iodide. 



Therapeutics. This is less irritant than the red iodide. Par- 

 ticularly useful in mercurial treatment of syphilis in man. 



* HYDRARGYRI NITRAS 



This is ofBcial as : 



1. Liquor Hydrargyri Nitratis. (60 per cent, mercuric nitrate 

 and 11, of free nitric acid.) 



2. Ungiheyitum Hydrargyri Nitratis. Citrine Ointment. (7 

 per cent, of mercuric nitrate), Mercury 7, nitric acid 17.5, Lard 76. 



Therapeutics. The ointment more or less diluted, is used as a 

 stimulant to indolent ulcers, ringworm, chronic eczema, or is applied 

 full strength to ulcers, foot rot, etc. 



It is often useful diluted 1 — 7 — 8 as a stimulant to chronic 

 eye diseases such as opacities or deposits in the cornea. 



Por Opacity of Cornea. 



B Unguenti Hydrargyri Nitratis 5 j 



Oleati Hydrargyri S ij 



Adipis Lanse Hydrosi 3 iij-v 



Sig. Paint on edge of lids once or twice daily. 



For Ringworm. 



^ TJnguenti Hydrargyri Nitratis 5 j 



Adipis 5 iv 



M. Ft. Unguentum. 



Sig. Apply to part twice daily. 



HYDRARGYRI AMMONIATUM — AMMONIATED MERCURY 



Synonyms. Mercuric Ammonium Chloride, White Precipitate 



This salt is made hy the action of ammonia upon bichloride of 

 mercury. It occurs as a white, odorless, tasteless, insoluble powder. 



Preparation. Unguentum Hydrargyri Ammoniati (10 per 

 cent.) in white petrolatum 50, Hydrus wool fat 40. 

 * Unofficial. 



