Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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To Prepare Aldehyde
Aldebegins to boil at 374°, and at 3920 has lostonly hyde is made by filling a tubulated glass re- 60 per cent. Evidently with these properties tort, altogether to one-third full, with 32 parts, it contains less aniline than the preceding one. absolute alcohol, 30 parts bichromate of po- The changes which these bases undergo when tassa, and, without previous cooling, a mixture converted into dyes or compounds of rosani- of 35 parts oil of vitriol, and 30 of water, in small line, are brought about by the partial destruc- portions, through a safety-tube in the tubus. tion of a portion of them.
After one-half of the latter has been intro-