C8H4N407 See also:

• C8H4N407 ALLOXANTIN

ALLOXANTIN  .3H2O, a product obtained by the See also:

• COMBINATION (Lat. combinare, to combine)

combination of alloxan and dialuric See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid, probably possessing the constitution NH—CO CO—NH I I I I CO C( OH)—O--CH CO NH—CO JO—NHone of the three molecules of See also:

• WATER

water being possibly constitutional . It forms small hard prisms which become red on exposure to See also:

• AIR (from an Indo-European root meaning " breathe," " blow ")
• AIR, or ASBEN

air containing See also:

• AMMONIA (NH3)

ammonia, owing to the formation of murexide (ammonium purpurate),C8H4(NH4)N506 . It may also be obtained by the See also:

• ACTION

action of sulphuretted See also:

• HYDROGEN [symbol H, atomic weight x-oo8 (0=16)]

hydrogen on alloxan . The tetra-methyl derivative, amalic acid, Cs(See also:

• CH3

CH3)4N4O7-, has been prepared by oxidizing See also:

• CAFFEINE, or THEINE (1.3.7 trimethyl 2 . 6 dioxypurin)

caffeine (q.v.) with See also:

• CHLORINE (symbol Cl, atomic weight 35`46 (0=16)

chlorine water, and forms See also:

• COLOUR (Lat. color, connected with celare, to hide, the root meaning, therefore, being that of a covering)

colour-less crystals which are only slightly soluble in hot water . The formation of murexide is used as a test for the presence of uric acid, which on evaporation with dilute nitric acid gives See also:

• ALLOXANTIN, C8H4N407

alloxantin, and by the addition of ammonia to the See also:

• RESIDUE (through the French, from the Lat. residuum, a remainder, from residere, to remain)

residue the See also:

• PURPLE

purple red colour of murexide becomes apparent .