Quinalizarin

Structural formula
General
Surname	Quinalizarin
other names	Alizarin Bordeaux Tetrahydroxyanthraquinone 1,2,5,8-tetrahydroxy-anthraquinone
Molecular formula	C 14 H 8 O 6
Brief description	dark red needles with a green metallic sheen
External identifiers / databases
CAS number 81-61-8 EC number 201-366-6 ECHA InfoCard 100.001.243 PubChem 5004 ChemSpider 4829 DrugBank DB08660 Wikidata Q1073575
properties
Molar mass	272.20 g mol −1
Physical state	firmly
Melting point	> 275 ° C
solubility	almost insoluble in water, poor in ethanol soluble in acetone , aqueous alkali solution, glacial acetic acid and sulfuric acid
safety instructions
GHS labeling of hazardous substances H and P phrases H: 302-400 P: 273
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Quinalizarin is an organic chemical compound that belongs to the group of alizarin dyes and thus the anthraquinones . It is used for the detection and colorimetric determination of beryllium , magnesium , boron , aluminum , gallium , indium and fluorides and was previously used for dyeing cotton. Quinalizarin is made from alizarin by heating with fuming sulfuric acid and boric acid .

Individual evidence

1. ↑ ^{a b c} Entry on quinalizarin. In: Römpp Online . Georg Thieme Verlag, accessed on March 5, 2014.
2. ↑ ^{a b} Omikron Online: Chinalizarin data sheet ( Memento from May 7, 2012 in the Internet Archive )
3. ↑ ^{a b} Data sheet quinalizarin, ≥95% (HPLC) from Sigma-Aldrich , accessed on June 2, 2016 ( PDF ).