, DERIVATIVES OF METHYL ALCOHOL. 39 



Methyl nitrate, CHAO.NO 2 . Kesults in small 

 quantity when a mixture of wood-spirit with salt- 

 petre and sulphuric acid is subjected to distillation. 

 Colorless liquid, boiling at 66. 



Methyl sulphate, (CH 3 .0) 2 S0 2 , is formed by distilling 

 wood-spirit with eight to ten times its weight of con- 

 centrated sulphuric acid. Colorless liquid, possessing 

 the odor of garlic, of specific gravity 1.324; boiling 

 point, 188. "is decomposed by heating with water, 

 yielding methyl alcohol and methylsulphuric acid. 



Methylsulphuric acid, CH 3 .0. SO.OH, is formed 

 by mixing one part of methyl alcohol with two parts 

 of concentrated sulphuric acid. Crystallizes in color- 

 less needles, when carefully evaporated ; forms easily 

 soluble salts with bases. The potassium salt, crystal- 

 lizing in deliquescent plates, yields by distillation 

 methyl sulphate. 



Methylsulphurous acid (sulphomethylic acid), 

 CH 3 .S0 2 .OH. The potassium salt, CH 3 .S0 2 .OK, is pro- 

 duced by heating methyl iodide with neutral potas- 

 sium sulphite to 100-120. The free acid is a syrupy 

 liquid. 



Trichlormethylsulphurous acid, CC1 3 .S0 2 .OH. 

 The barium salt, (CCl 3 .S0 3 ) 2 Ba, is obtained by digest- 

 ing trichlomethyl sulphochloride with baryta water. 

 The acid, set free from this salt by means of sulphuric 

 acid, crystallizes in small, colorless, very deliquescent 

 prisms. Very strong acid. 



Trichlormethyl sulphochloride, CC1 3 .S0 2 C1. Is 

 formed by the action of hydrochloric acid and black 

 oxide of manganese, or of hydrochloric acid and potas- 

 sium bichromate on carbon bisulphide. An addition 

 of nitric acid aids the reaction. Colorless, crystalline 

 mass ; insoluble in water ; easily soluble in alcohol and 

 ether. Melting-point, 135 ; boiling-point, 170 ; also 

 volatile with the vapor of water without decomposi- 

 tion. 



rrw 



