140 GLYCOLS. 



chlorhydrine with organic bases. The most important 

 of these is 



Trimethyloxethylammonium hydroxide (Bili- 

 neurine, choline, sinkaline), C 5 H 15 ^0 2 = C 2 H 4 .OH. 

 (CH 3 ) 3 I^".OH. Is contained in bile; is produced from 

 sinapine (see Alkaloids) by gently heating with barium 

 or potassium hydroxide ; and can be most readily pre- 

 pared by mixing a concentrated solution of trimethyl- 

 amine with ethylene oxide. The chloride C 2 H 4 .OH. 

 (CH 3 ) 3 !N~.C1 is produced by the direct union of ethylene 

 chlorhydrine and trimethylamine. The free base is 

 colorless, crystalline, very easily soluble in water, and 



Csesses very strong basic properties. Its solution in 

 Irochloric acid, when treated with platinum chlo- 

 ride and absolute alcohol, gives a yellow precipitate 

 (C 5 H 14 lTO.Cl) 2 PtCl 4 , which crystallizes from water in 

 hexagonal plates ; with gold chloride a yellow crystal- 

 line precipitate C 5 H 14 N"O.C1 + AuCl 3 . Hydriodic acid 

 converts it into trimethyliodethylammonium iodide C 2 H 4 I 

 (CH 3 ) 3 ET, a substance that crystallizes well and is diffi- 

 cultly soluble in cold water. When treated in aqueous 

 solution with silver oxide, the latter compound is con- 

 verted into trimethylvinylammonium hydroxide (neurine) 

 C 2 H 3 (CH 3 ) 3 KOH. This is a very easily soluble base, 

 which is also formed by boiling the substance of brain 

 (lecithine, protagon) with baryta water. 



Sulphoglycolic acid (Glycolsulphuric acid), C 2 H 6 SO 

 CH 2 .OH 



^ CH 2 O SO 2 OH 1S f rmec '- by heating equal mole- 

 cules of ethylene alcohol and concentrated sulphuric 

 acid to 150'. The barium salt (C 2 H 5 S0 5 ) 2 Ba is very 

 easily soluble in water and crystallizes with difficulty. 



CKP.OH 

 Isethionic acid, C 2 HS$0 4 = 2 2 (isomeric 



with ethylsulphuric acid), is formed when sulphuric 

 anhydride is conducted into well-cooled alcohol or 



