SAL TS OF SULPHO- CARB OL1C A CID. 3 T i 



is consumed without flame. The pure salt is sin- 

 gularly tasteless, only possessing a very slight bitter- 

 ness. 



'Potassium Stilpho-Carbolate, K(C 6 H 5 )SO 4 -f Aq., is 

 prepared in. a mode similar to that described for the 

 sodium salt, neutralizing the sulpho-carbolic acid with 

 potassium carbonate, or hydrate. A mmonium Sulpho- 

 Carbolate, NH 4 (C 6 H 5 )SO 4 + Aq., is obtained by neu- 

 tralizing with ammonium carbonate or ammonium 

 hydrate (liq. ammoniae). It crystallises usually in the 

 form of rectangular plates, and generally resembles 

 the potassium salt. Magnesium Sulpho-Carbolate, 

 Mg (C 6 H 5 )SO 4 + Aq. Prepared in analogous manner 

 from magnesium carbonate, is usually a mass of small 

 brilliant crystals, but by careful crystallisation it may 

 be obtained in fine rhombic prisms. It is very soluble. 

 Calcium Sulpho- Car bo late, Ca(C 6 H 5 )So 4 H- Aq. By 

 neutralizing with calcium carbonate (pure precipitated 

 chalk), this salt is obtained in a congeries of needle- 

 shaped or feathery crystals of a brilliant white appear- 

 ance, the interlacing network forming an exceedingly 

 light spongy mass. It is soluble in its own weight of 

 cold water. Zinc Sulpho-Carbolate, Zn (C 6 H 5 )SO 4 

 -f /Aq. To prepare this salt, pure sulpho-carbolic acid 

 may be saturated with zinc oxide, or pure zinc itself 

 may be used, hydrogen escaping in the decomposition. 

 Or to a filtered solution of 10 parts of barium sulpho- 

 carbolate in three or four times its weight of water, a 

 solution of six parts pure zinc sulphate dissolved in 



Y 2 



