AURAMINE, a yellow synthetic dye. There are several dif ferent methods of preparation. It crystallizes from water or al cohol in yellow scales, melts at 267° C, and carbonizes without previous fusion at C. It decomposes when heated as an aqueous solution, above 70° C, and when treated with acids. It dyes wool and silk direct, but cotton has to be mordanted pre viously. (See DYES, SYNTHETIC.)