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Spinochrome (other)
Spinochrome can refer to any of a series of chemical compounds: * Spinochrome B (2,3,5,7-tetrahydroxy-1,4-naphthalenedione) * Spinochrome D (2,3,5,6,8-Pentahydroxy-1,4-naphthalenedione) * Spinochrome E (hexahydroxy-1,4-naphthalenedione) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinochrome B
Spinochrome B (2,3,5,7-tetrahydroxynaphthoquinone) is an organic compound with formula , formally derived from 1,4-naphthoquinone through the replacement of four hydrogen atoms by hydroxyl (OH) groups. Spinochrome B occurs naturally as pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compo ... in the Mollusc shell, shell and spines of sea urchins such as the Japanese dull red species ''aka-uni'' (''Pseudocentrotus depressus''), the greenish-black ''murasaki-uni'' (''Heliocidaris crassispina''), and the brown ''bafun-uni'' (''Strongylocentrotus pulcherrimus'').Chika KURODA and Masae OKAJIMA (1958), ''Studies on the Derivatives of Naphthoquinones, XIV. The pigments of sea urchins, IX''. Proc. Japan Acad., volume 34, pages 616--618Online versionaccessed on 2010-02-01. Pigment M2 is dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinochrome D
Spinochrome D (2,3,5,6,8-pentahydroxy-1,4-naphthoquinone) is an organic compound with formula , formally derived from 1,4-naphthoquinone through the replacement of five hydrogen atoms by hydroxyl (OH) groups. Spinochrome D occurs naturally as a brownish red pigment in the shell and spines of sea urchins such as the Japanese ''aka-uni'' (''Pseudocentrotus depressus'').Chika KURODA and Masae OKAJIMA (1967), ''Studies on the Derivatives of Naphthoquinones, XVIII. The pigments of sea urchins, XIII''. Proc. Japan Acad., volume 43, pages 41--44Online versionaccessed on 2010-02-01. It is soluble in diethyl ether and crystallizes as brownish red needles that sublime at 285−295 °C. The compound gives a yellowish brown solution when treated with sodium hydroxide, a bluish green solution with ferric chloride, and a violet precipitate with lead acetate. It forms a five-fold acetate ester, ()5, that crystallizes from methanol as yellow needles that melt at 185−186 °C. See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |