Scoparin, Scutellarein(CHAPTER V. The Flavone Group.)(Osa artikkelista)

The Natural Organic Colouring Matters
By
Arthur George Perkin, F.R.S., F.R.S.E., F.I.C., professor of colour chemistry and dyeing in the University of Leeds
and
Arthur Ernest Everest, D.Sc., Ph.D., F.I.C., of the Wilton Research Laboratories; Late head of the Department of Coal-tar Colour Chemistry; Technical College, Huddersfield
Longmans, Green and Co.
39 Paternoster Row, London
Fourth Avenue & 30th Street, New York
Bombay, Calcutta, and Madras
1918

Kaikki kuvat (kemialliset kaavat) puuttuvat // None of the illustrations (of chemical formulas) included.

Cytisus scoparius Jänönpapu, jänönvihma

Scoparin, the colouring matter of the Cytisus scoparius (Link.), has been investigated by Stenhouse (Annalen, 78, 15), by Hlasiwetz (Annalen, 138, 190), and by Goldschmiedt and Hemmelmayer (Monatsh., 14, 202).

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Scutellarin. If the flowers and leaves of Scutellaria altissima are extracted with water the solution on keeping deposits crystals of scutellarin, C₂₁H₁₈O₁₂ (Molisch and Goldschmiedt, Monatsh., 1901, 22, 68; Goldschmiedt and Zerner, ibid.) 1910, 31, 439). It melts above 310, is sparingly soluble in the usual solvents, and the alcoholic solution gives with lead acetate a red precipitate, and with ferric chloride a green coloration passing into red on heating. With the haloid acids and sulphuric acid in the presence of acetic acid orange-red crystalline oxonium compounds separate, which are readily decomposed in contact with water.

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