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The color lakes of congo red
Congo Red, the di-sodium salt of diphenyl-disazo-bis-mapthylamine-4-sulfonio acid, forms a free, blue acid when treated with acids and the sodium replaced by hydrogen. This is insoluble but forms a colloidal suspension of ...
The preparation of organosols and the determination of their stability
It ms the purpose of this research to prepare a number of colloidal dispersions in organic solvents and to determine their stability. The discussion is divided into two parts, the first of which is concerned only with the ...