Rhine (Anthranoid)

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Structural formula
Structural formula of the Rhine
General
Surname Rhine (Anthranoid)
other names
  • 4,5-dihydroxyanthraquinone-2-carboxylic acid
  • Cassinic acid
  • Rhubarb yellow
Molecular formula C 15 H 8 O 6
Brief description

orange needles

External identifiers / databases
CAS number 478-43-3
EC number 207-521-4
ECHA InfoCard 100.006.839
PubChem 10168
ChemSpider 9762
DrugBank DB13174
Wikidata Q720356
properties
Molar mass 284.22 g mol −1
Physical state

firmly

Sublimation point

321 ° C

solubility
  • almost insoluble in water
  • soluble in pyridine and alkaline solutions
safety instructions
GHS labeling of hazardous substances
07 - Warning

Caution

H and P phrases H: 315-319-335
P: 261-305 + 351 + 338
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Rhine (pronunciation: Rhe-in ) is a chemical compound from the group of anthranoids , which is formed by the polyketide route .

Occurrence

Rhine occurs both free and in the form of β- D - glucosides as well as dimers ( sennosides ) in the roots of Rheum palmatum (medicinal rhubarb) and the meadow sorrel and in Senna alexandrina ( senna leaves).

Herbal anthraquinone derivatives

use

Rhein-1,8-diacetate in particular is used as a laxative and anti-inflammatory agent for the treatment of arthritis .

Individual evidence

  1. ↑ a b c d e f g Entry on Rhine. In: Römpp Online . Georg Thieme Verlag, accessed on July 19, 2014.
  2. ↑ a b Rhine data sheet at Sigma-Aldrich , accessed on July 19, 2014 ( PDF ).