HANDBOOK FOR BIO-CHEMICAL LABORATCEY. 61 



composed enxanthic acid and euxanthon on the filter. These 

 are again treated with water as above. The filtrate is evapo- 

 rated in a flat dish, care being taken not to have too high a 

 temperature. When at a syrupy consistency it is allowed to 

 stand, when crystals of glycuronic acid anhydride are obtained. 

 (Thierf elder.) 



Properties. Glycuronic acid is not crystalline, but is ob- 

 tained only as a syrup. It dissolves in alcohol, and is easily 

 soluble in water. It forms crystalline salts with potassium 

 and sodium. The neutral lead salt is soluble in water, but 

 the basic salt is, on the contrary, insoluble. The acid is dex- 

 tro-rotatory (a)D = -f 19.4, and reduces alkaline solutions of 

 copper, silver, and bismuth salts. It gives a crystalline com- 

 bination with phenyl hydrazine, melting at 114-115 C. 



