Water-soluble red pigments from monascorubrin and rubropunctatin

Food or edible material: processes – compositions – and products – Addition of dye or pigment – including optical brightener

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426540, 435911, A23L 1275

Patent

active

050135651

ABSTRACT:
The orange, water-insoluble pigments monascorubrin and rubropunctatin elaborated by Monascus species can be converted to high purity red, water-soluble pigments by reaction with stoichiometric quantities of organic materials bearing a primary amine functionality. These pigments are suitable as colorants for a broad variety of edible formulations, especially those intended for human consumption, and often serve as suitable replacements for FD&C Red No. 2 and Red No. 4.

REFERENCES:
patent: 3765906 (1973-10-01), Yamaguchi et al.
patent: 3993789 (1976-11-01), Moll et al.
Food Technology, p. 49, (Jul., 1986).
B. C. Fielding et al., Tetrahedron Letters, No. 5, 24-7 (1960).
Y. Inouye et al., Tetrahedron, 18, 1195 (1962).
Kumasaki et al., Tetrahedron, 18, 1171 (1962).
Wong and Koehler, J. Food Science, 48, 1200 (1983).

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