OXIMIDOSULPHONATES OR SULPHAZOTATES. 65 



a 14 normal instead of t normal salt, was obtained in long rhombic 

 prisms of small size by dissolving up 5*2 grams of dipotassium salt 

 (slightly alkaline) in oOccs. of a satm-ated solution of sodium chloride 

 and 5ccs. of water, by the aid of a gentle heat, and ]en\'ing the 

 solution to cool : — 



Calc. Found. 



Potassium 12-70 14-62 



Sodium 7*-19 7-60 



Sulphur 20-85 20-87 



Reaction between the dipotassium salt and sodium chloride gives 

 also, as alreadv described, p. 57, a double oximidosulphonate-chloride, 

 besides other compounds allied to this and the salt just described. It 

 is a reaction which requires fuller investigation than we have fjund 

 time to make of it, and what follows is all we can add concerning it. 



While from sodium oximidosulphonate and potassium chloride, 

 potassium oximidosulphonate crystallises out nearly free from sodium, 

 tliere is obtained from potassium oximidosulphonate dissolved in 

 sufficient quantity in a hot concentrated but not saturated solution 

 of sodium chhn'ide, a crystallisation of oximidosulphonate, half 

 potassium, half sodium. If the sodium-chloride solution is saturated 

 arjd the potassium oximid()su]['honate is dissolved in it in the cold, 

 what appears to be a compound of these salts, already described, 

 quicklv separates. Ihit if l^v the aid of heat more potassium oximido- 

 sulphonate is dissolved, the salt which crystallises out is what may be 

 represented as sodium chloride in combination with potassium-sodium 

 oximidosulphonate. And if in the mother-liquor of this salt, now 

 containing sodium oximidosulphonate in place of some of its sodium 

 chloride, potassium oximidosulphonate is again dissolved l)y heat, the 

 crystals wdiich form on cooling consist of an oximidosulphonate. more 

 of sodium than of potassium, and with only very little sodium 



