OLANIN. 89 



1. When Per chloride of Iron is mixed with muriate of ola- 

 nin, a double oily salt is formed, having a deep brown colour so- 

 luble in twice its weight of cold water ; but requiring four times 

 its weight of hot water to dissolve it. Hence when a saturated 

 cold solution is raised to the boiling temperature, a great deal of 

 the salt is separated, which is again redissolved as the solution 

 cools. This double salt is neither decomposed by boiling nor by 

 acids. It dissolves in oil of cumin, and water can only take it 

 from that solution by long boiling, and in proportion as the oil 

 evaporates. 



2. Corrosive sublimate and 'muriate of olanin form an oily co- 

 lourless double salt. Olanin combines with corrosive sublimate 

 into a subsalt, little soluble in water, and having a yellow colour. 

 It is fusible, and resembles a resin. It requires a thousand times 

 its weight of boiling water to dissolve it, and from this solution 

 it is deposited in a crystalline form. It is not decomposed by 

 boiling, and is insoluble in alcohol. 



3. Chloride of gold forms with muriate of olanin a neutral 

 double salt, having a deep-brown colour. It is little soluble in 

 cold, but more soluble in hot water, and is very soluble in alco- 

 hol and ether. When this salt is long boiled with water, a little 

 of the gold is reduced to the metallic state. 



Chloride of gold and olanin form a subsalt resembling a re- 

 sin. It is hard, brown, insoluble in water, but soluble in alco- 

 hol. If we pour muriatic acid into that solution, the salt be- 

 comes neutral. But this scarcely happens unless alcohol be pre- 

 sent. 



4. With chloride of platinum, olanin forms a double neutral 

 salt, which has the appearance of tar. It is more soluble in wa- 

 ter than the chloride of gold and olanin. It is also very soluble 

 in alcohol, but insoluble in ether.* 



* Unverdorben, Poggendorf's Annalen, xi. 70. 



