132 INOSIC ACID. 



mother liquor of this will, on further evaporation, 

 yield nearly pure sarkine salt. Purify by recrystallisa- 

 tion, dissolve in hot caustic potash, add ammonium 

 chloride, filter if necessary, pass carbonic acid in excess 

 through the solution, collect, and wash the precipitate 

 of sarkine. 



2. Its reactions are those of xanthine, except its 

 greater solubility in hydrochloric acid, and the fol- 

 lowing : 



3. To a dilute solution of hypoxanthine in nitric 

 acid add silver nitrate; a copious white precipitate 

 will be produced (see Xanthine 5). 



Inosic acid, C 5 H 8 N 2 6 . 1. Take the mother liquor 

 obtained in the preparation of kreatine (see Kreatine) 

 from flesh. Concentrate and mix with alcohol till it 

 has a milky consistence, allow to stand and crystallise. 

 Pour off the liquid, dissolve the crystals in hot water, 

 add a solution of baryum chloride ; crystals of baryum 

 inosate are deposited on cooling. Separate these 

 crystals, dissolve in a little boiling water, and add 

 sulphuric acid as long as a precipitate falls ; allow to 

 stand, decant, and evaporate the clear liquid, when 

 inosic acid will be left as an uncrystallisable, syrupy 

 mass. 



2. Inosic acid is easily soluble in water ; alcohol 

 precipitates it from aqueous solution; it is insoluble 

 in ether. 



3. Add to an aqueous solution of inosic acid a solu- 

 tion of copper sulphate ; a bluish-green precipitate falls 

 soluble in ammonia. 



