Purpurin

Purpurin

Chembox new
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IUPACName = 1,2,4-trihydroxyanthracene-9,10-dione
OtherNames = Purpurin(e), Hydroxylizaric acid
Section1 = Chembox Identifiers
CASNo = 81-54-9
PubChem = 6683
SMILES = C1=CC=C2C(=C1)C(=O)C3=C(C2=O)C(=C(C=C3O)O)O
Section2 = Chembox Properties
Formula = C14H8O5
MolarMass = 256.210 g/mol
Appearance =
Density =
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Section3 = Chembox Hazards
MainHazards =
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Purpurin, or 1,2,4-trihydroxyanthraquinone, is a naturally occurring red/yellow dye in the roots of the plant madder (or known as Rubia tinctorum L). Purpurin also occurs in madder with alizarin. Purpurin is a crystalline compound with the formula of C14H5O2(OH)3 that is colorless until dissolved in alkalic solutions. It is soluble in ethanol (becomes red) and is soluble in water at boiling and alkalis water (becomes yellow). It has the appearance of dark red needles. It is also called Verantin, Smoke Brown G, Hydroxylizaric acid, and C.I. 58205.

Purpurin is a fast dye for cotton printing and forms complexes with various metal ions.

As relating to biochemistry, purpurin is a glycosaminoglycan binding protein as well as a retinol binding protein. Purpurin's pattern of sequences has shown it to belong to the lipocalin family of proteins.

References

* The Lipocalins: A Review. The Edward Jenner Institute for Vaccine Research.


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Look at other dictionaries:

  • purpurin — purpurin, ine [ pyrpyrɛ̃, in ] adj. • déb. XIVe; réfect. de pourprin, d apr. lat. purpura ♦ Poét. ou plaisant De couleur pourpre. ⇒ pourpré. Des lèvres purpurines. ● purpurin, purpurine adjectif (du latin purpura, pourpre) …   Encyclopédie Universelle

  • purpurin — purpurin, ine (pur pu rin, ri n ) adj. Qui approche de la couleur de pourpre. •   Il [le phénix] recevait d elle des biscuits et des pistaches qu il prenait de sa patte purpurine et argentée, et qu il portait à son bec avec des grâces… …   Dictionnaire de la Langue Française d'Émile Littré

  • Purpurin — Pur pu*rin, n. (Chem.) A dyestuff resembling alizarin, found in madder root, and extracted as an orange or red crystalline substance. [1913 Webster] …   The Collaborative International Dictionary of English

  • Purpurin — (Oxylizarinsäure, Krapppurpur), C18 H6 O6 + HO, ein rother Farbstoff des Krapps (s.d.). Zu seiner Darstellung läßt man Krapp mit Hefe u. Wasser gähren u. kocht den gegohrenen Krapp mit concentrirter Alaunlösung ab; aus dieser Abkochung scheiden… …   Pierer's Universal-Lexikon

  • Purpurīn — (Rubiacin, Krappurpur, Trioxyanthrachinon) C14H8O5 oder C14H5(OH)3O2 findet sich in der frischen Krappwurzel wohl als Glykosid, das durch Fermente in Zucker und P. zerfällt, in alter Krappwurzel aber großenteils schon zersetzt ist. P. entsteht… …   Meyers Großes Konversations-Lexikon

  • Purpurin — Purpurin, s. Farbstoffe, künstliche organische, Bd. 3, S. 626, und Krapppräparate …   Lexikon der gesamten Technik

  • Purpurin — Purpurīn, Krappurpur, Trioxyanthrachinon, ein Farbstoff des Krapps, Begleiter des Alizarins im Krapp, wie dieses aus Anthrazen künstlich hergestellt, orangefarbene Nadeln; färbt mit Tonerde gebeizte Baumwolle scharlachrot, mit Chrom gebeizte… …   Kleines Konversations-Lexikon

  • Purpurin [2] — Purpurīn, Glasmasse, s.v.w. Hämatinon (s.d.) …   Kleines Konversations-Lexikon

  • purpurin — Purpurin, ou qui est de couleur de pourpre, Purpureus …   Thresor de la langue françoyse

  • purpurin — [pʉr′pyoo rin, pʉr′pyo͞orən] n. [< L purpura, PURPLE + IN1] a reddish material, C14H5O2 (OH) 3, isolated from the madder root or produced synthetically: used as a dye, stain, etc …   English World dictionary

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