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.
Home › Acids › To Decolorize Sulphuric Acid
To Decolorize Sulphuric Acid
Acid which has become brown by exposure may be decolorized by heating it gently; the carbon of the organic substances is thus converted into carbonic acid.