Rubia iberica

This is a principal colouring matter found in the roots of Rubia iberica C. Koch (Stikhin et al., 1968 cf Schweppe and Winter, 1977). 

SHKHIN et al (1968) Stikhin, VA. Bankivskii, A.I. Perelsen, M.E. Natural quinoines 2. Lucidin primeveroside from Rubia iberica (Fisch. ex D.C.) C. Koch Khim. Prirodn. Soedin., Akad. Nauk. Uz. (1968)... 

Various species of Rubia (Rubiaceae) produce the dyestuff known commonly as madder (. v.) the most common species are Rubia tinctorum L. R. peregrina L. R. cordifolia L. R. sikkimensis Kurz. R. akane Hakm R. iberica C. Koch R. rigid-ifolia Pojark (Schweppe, 1992 Schweppe and Winter, 1997). For a fuller discussion of the various members of the Rubiaceae that produce madder-related anthraquinone dyestuffs, see the entry for madder. 

Found in madder root Rubia tinctorum) as the glycoside, Ruberythric acid. Also found in R. iberica, R. cordifolia and in tissue cultures of Galium mollugo, Morinda citrifolia. Cinchona ledgeriana and C. pubescens. Bonds with calcifying tissues and has been used in studies of bone formation. Used in photometric detn. of B, Al, Ge, F , SO acid-base indicator (pH range 5.8-7.2 and 11.0-13.0). Orange or red needles or prisms (EtOH or by subl.). V. spar. sol. H2O. Mp 288-289°. Bp 430°. pi i 7.45 pK 2 11-80. Sublimes. 

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