Alizarin

Name: Alizarin

CAS Registry Number: 72-48-0

CA Index Name: 9,10-Anthracenedione, 1,2-dihydroxy-

Other Names: Alizarin B; Anthraquinone, 1,2-dihydroxy-; 1,2-Anthraquinonediol; 1,2-Dihydroxy-9,10-anthracenedione; 1,2-Dihydroxy-9,10-anthraquinone; 1,2-Dihydroxyanthraquinone; 1,2-Dihydroxyanthrachinone; Acid Metachrome Red B; Acid Mordant Red B; Alizarin; Alizarin Red; Alizarina; Alizarine; Alizarine 3B; Alizarine B; Alizarine Indicator; Alizarine L Paste; Alizarine Lake Red 2P; Alizarine Lake Red 3P; Alizarine Lake Red IPX; Alizarine NAC; Alizarine Paste 20 percent Bluish; Alizarine Red; Alizarine Red B; Alizarine Red B2; Alizarine Red IP; Alizarine Red IPP; Alizarine Red L; C Ext. Red 62; C.I. 58000; C.I. Mordant Red 11; Certiqual Alizarine; C.I. Pigment Red 83; D And C Orange Number 15; Deep Crimson Madder 10821; Eljon Madder; Mitsui Alizarine B; Mordant Red 11; NSC 7212; Sanyo Carmine L2B; Turkey Red

Merck Index Number: 251

Chemical / Dye Class: Anthraquinone

Molecular Formula: C₁₄H₈O₄

Molecular Weight: 240.21

Physical Form: Orange needles or powder

Solubility: Virtually insoluble in water; moderately soluble in ethanol; soluble in benzene, toluene, xylene, pyridine, acetic acid; freely soluble in hot methanol, ether

Melting Point: 290 °C

Boiling Point: 430 °C

pH Range: 5.5-6.8; 10.1-12.1

Color Change at pH: Yellow (5.5) to red (6.8); red (10.1) to purple (12.1)

pK_a: 6.77

Absorption (λ_max): 567 nm, 609 nm

Synthesis: Synthetic methods

Staining Applications: Bacteria; human adipose-derived stem cells; multipotent adult progenitor cells; parasite; lips; skin; hairs; keratin fibers

Biological Applications: Detecting microorganisms; treating dermatological conditions

Industrial Applications: Solar cells; plasma display panel; antireflective coatings; chemical mechanical polishing; optical recording materials; inks; paints; adhesives; thermoplastics; detergents; textiles; wood

Safety / Toxicity: Acute oral toxicity; carcinogenicity; clastogenicity; environmental toxicity; estrogenicity; genotoxicity; hypersensitivity; mutagenicity; photoinduced toxicity

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