The water-soluble colorant extracted from brazilwood and sappanwood. Brasilin oxidizes in air to form brasilein which is soluble in water. It is used as a dye, ink for red and purple colors. Brasilin is also used as an acid-base indicator turning yellow in acid and bright red in alkali.
See Brazilwood dye.
Synonyms and Related Terms
Natural Red 24; CI 75280; brasileina (Esp.); brasiliini (Fin.); brasilina (It.); brasileína (Port.); brazilein; brazilin; Brazilwood extract; permambuco extract; hypernic extract
Sensitive to air and light.
Physical and Chemical Properties
Yellow, needle-like crystalline solid
Soluble in water, ethanol, ether, alkalis.
|Melting Point||130 C (dec)|
|Molecular Weight||mol. wt. = 286.28|
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1392
- Website: http://www.coloria.net/varita.htm - Finnish name