) 



fkemy's sulphazotised salts of potassium. 229 



position is to deprive it of much of its nitrite and to convert the 

 2/3-normal into more nearly normal hydroximidosulphate — to 

 replace, therefore, potassium nitrite by potassium hydroxide. 

 Accepting Fremy's mean numbers as accurate, what he analysed 

 had the composition, 



llKoNSoO^OHo; KoHNSA, SOH,; 2(KoHNSA, KNO,). 



Putssm. Sulphur Nitrogen Alk. potssm. 

 Found, 34.9 19. ,5.5 4.9 per cent. 



Calc, 34.9 19..51 4.9 9.36 „ 



But his analyses have no claim to receive such close treat- 

 ment, his nitrogen seemingly being always much too low ; and it 

 is sufficient to say of his ' sulphazate ' that it was the silky 

 asbestus-like nitrito-2/o normal hydroximidosulphate more or less 

 converted into the also silky asbestus-like normal hydroximido- 

 sulphate, an account of it with which Fremy's description of its 

 other properties entirely agrees. With dilute acids it gave slowly 

 nitrous oxide unmixed with nitric oxide. Fremy specially points 

 out that no sulphazic acid or any other sulphazates could be ob- 

 tained from the potassium salt. There is, therefore, nothing to 

 justify belief in this compound being the salt of a particular 

 single acid, the sulphazic. 



Sulphazite. — What Fremy named potassium sulpkazite he only 

 once obtained, and then not by direct sulphonation of t]ie nitrite, 

 in the form of white mammillated crystalline crusts from a solu- 

 tion thickened by the other salts contained in it. That is, to 

 say, his sulphazate when dissolved in a little water containing 

 some potassium hydroxide deposited crystals of basic sulphazotate 

 {5/6 normal hydroximidosulphate), and left a mother-liquor which 

 on cold evaporation till syrupy yielded the sulphazite. It showed 

 great analogy with his sulphazate but was distinguished from it 



