Alizarin violet

Structural formula
General
Surname	Alizarin violet
other names	1,4-dihydroxyanthraquinone-2-sulfonic acid CI 58055 CI Pigment Violet 5
Molecular formula	C 14 H 8 O 7 S
Brief description	purple odorless powder
External identifiers / databases
CAS number 145-48-2 22297-70-7 (sodium salt) 1328-04-7 (aluminum complex) EC number 205-654-2 ECHA InfoCard 100.005.141 PubChem 8960 ChemSpider 8616 Wikidata Q2647306
properties
Molar mass	434.39 g mol −1
Physical state	firmly
density	1.92 g cm −3
solubility	almost insoluble water
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Alizarin violet is a synthetic organic dye from the group of the anthraquinones , more precisely the quinizarin derivatives. The color is a reddish purple, undiluted a very pure and deep tone. The dye is moderately to sufficiently lightfast.

In older literature, the substance known today as pyrogallolphthalein was also referred to as alizarin violet.

See also

• Alizarinviolet 3B C ₂₁ H ₁₅ NO ₃ , CAS number: 4430-18-6

Individual evidence

1. ↑ ^{a b c d} Safety data sheet from Kremer Pigments (PDF file; 127 kB), accessed on December 27, 2019.
2. ↑ Meyer Lexicon .