]52 PROPERTIES OP CAMPHORIC ACID. 



from the ben- was similar to benzoic acid. Bucholz has lately resumed 

 the subject, and shown, that the camphoric is a peculiar 

 acid. The following properties sufficiently distinguish 

 them. 



in crystalliza- *• The camphoric acid is crystallizable by slow refriger- 



t»°n, ation. The crystals, as Bouillon-Lagrange observed • 



greatly resemble plumose muriate of ammonia. The 

 benzoic acid, on the contrary, under the same circum- 

 stances crystallizes in small needles, or in ribandlike 

 laminae. 



taste, 2. The taste of camphoric acid is very sour, and leaves 



a bitterness behind ; while that of the benzoic is sweet, sac- 

 charine, little acid, pungent, and excites coughing. 



solubility in 3. Camphoric acid dissolves at 15° R, [6576° !.] in 100 



water > parts of water, and at a boiling heat in fen or eleven. 



Benzoic acid requires 24 parts of boiling water, and 200 at 

 15° [65-75° F/J 



and in alcohol, 4. One part of alcohol at the common temperature 

 dissolves 1*06 of camphoric acid ; and 92 parts of boiling 

 alcohol dissolve 146, or even more. Benzoic acid requires 

 its own weight of boiling alcohol, and twice as much cold. 



phenomena of 5. Camphoric acid is capable of being sublimed as well- 



su imation, ag ^ b enzo i Cj tj ut t ne a pp ea rances are very different. In 

 the first place it sublimes more difficultly : a great quantity 

 is decomposed: an empyreumatic oil is produced with a 

 smell of navew, an acid liquor, and a great deal of coal: 

 and the sublimate has not a crystalline form. The benzoic 

 acid sublimes in crystals, and yields no aqueous vapour, 

 very little oil, and much less coal than the camphoric. 



(Properties of The camphoric acid when sublimed has a pungent and 



the sublimed slightly acid taste. On account pf the oil it dissolves more 

 slowly in water. This solution reddens litmus paper. 



and action ou 6. The camphoric acid comports itself very differently 



bases, with respect to the salifiable bases. 



. , . The camphorate of lime exhibits a striking- difference 



particularly l » 



lime. from the benzoate of lime. , 



A hundred parts of camphoric acid require for their per- 

 fect neutralization 50 parts of carbonate of lime; while the 

 same quantity of benzoic acid requires {± parts. 



The camphorate of lime crystallizes difficultly in rounded 



heaps 



