332 PROCEEDINGS OF THE AMERICAN ACADEMY 



Monoethyl mucoxychlorate crystallizes in clustered, obliquely trun- 

 cated jjrisms, which melt at 94-95°, aud sublime unchanged at higher 

 temjierature. It dissolves readily in water, alcohol, ether, or chloro- 

 form, quite readily in boiliug benzol, more sparingly in cold, and but 

 sparingly in ligroin. Its aqueous solution is strongly acid to litmus, 

 dissolves carbonates with effervescence, and gives a deep red coloration 

 with ferric chloride. When baric hydrate is slowly added to the 

 aqueous solution, a yellow color is developed, and products formed 

 which we have not yet more fully studied. If, however, the ether is 

 dissolved in an excess of baric hydrate, it is saponified and baric 

 mucoxychlorate formed. The alkaline solution was precipitated with 

 carbonic dioxide, and alcohol added to the filtered solution. The 

 crystalline salt which separated was dissolved in cold water, and the 

 solution evaporated over sulphuric acid in vacuo. 



0.7070 grm. of air-dried salt lost over sulphuric acid 0.0482 grm. HgO. 



Calculated for BaC4nC104 . 2 HjO. Found. 



I.H2O 5.60 6.82 



0.6588 grm. of the salt dried over II2SO4 lost, at 100°, 0.0385 grm. H2O. 



Calculated for BaC4HCl . 11,0. Found. 



HgO 5.93 ' 5.85 



0.6203 grm. of the salt dried at 100° gave 0.3535 grm. BaSO^. 



Calculated for BaCjHClOi. Found. 



Ba 47.98 47.85 



Decomposition in Alkaline Solution. 



The instability of mucoxychloric acid and its salts when heated in 

 aqueous solution has already been mentioned. We have, however, as 

 yet studied more closely only the reaction which takes place when 

 baric mucoxychlorate is heated with an excess of baric hydrate. The 

 solution soon grows turbid on boiliug, aud throws down baric oxalate 

 and baric carbonate, while the solution then contains baric chloride 

 and formiate. The insoluble salts were collected upon a filter, and 

 the presence of carbonic and oxalic acids established by qualitative 

 tests. The presence of oxalic acid was still further confirmed by an 

 analysis of the calcium salt. 



0.1740 grm. of the salt dried at 100=* gave 0.1608 grm. CaSO^. 



Calculated for CaCjOi . HjO. Found. 



Ca 27.39 ' 27.17 



