Alizarin Red S
Name: Alizarin Red S
CAS Registry Number: 130-22-3
CA Index Name: 2-Anthracenesulfonic acid, 9,10-dihydro-3,4-dihydroxy-9,10-dioxo-, monosodium salt
Other Names: 2-Anthraquinonesulfonic acid, 3,4-dihydroxy-, sodium salt; Acid Mordant Red SW; Acid Red Alizarine; Ahcoquinone Red S; Alizarin Carmine; Alizarin Red S; Alizarin S; Alizarine Carmine; Alizarine Carmine Indicator; Alizarine Red A; Alizarine Red AS; Alizarine Red Indicator; Alizarine Red S; Alizarine Red S sodium salt; Alizarine Red SW; Alizarine Red SZ; Alizarine Red W; Alizarine Red WA; Alizarine Red WS; Alizarine Red for Wool; Alizarine S; Alizarine S Extra Conc. A Export; Alizarine S Extra Pure A; Alizarinsulfo-nate; C.I. 58005; C.I. Mordant Red 3; Calcochrome Alizarine Red SC; Carnelio Rubine Lake; Chrome Red Alizarine; Diamond Red W; Ext D and C Red No. 7; Fenakrom Red W; Mitsui Alizarine Red S; Mordant Red 3; Oxanal Fast Red SW; Sodium 3,4-dihydroxyanthraqui-none-2-sulfonate; Sodium alizarin-3-sulfonate; Sodium alizarinesulfonate; Sodium alizarinsulfonate
Merck Index Number: 8573
Chemical / Dye Class: Anthraquinone
Molecular Formula: C14H7NaO7S
Molecular Weight: 342.26
Physical Form: Orange-yellow powder
Solubility: Freely soluble in water; soluble in ethanol; insoluble in ether
Melting Point: 287-289 °C
pH Range: 3.5-6.5; 9.4-12.0
Color Change at pH: Yellow (3.5) to red (6.5); orange (9.4) to violet (12.0)
pKa: 4.5, 11
Absorption (λmax): 556 nm, 596 nm, 423 nm, 546 nm
Synthesis: Synthetic methods
Staining Applications: Bacteria; bones; cartilage; dental plaques; fetal skeletons; fish; myocardium; protein particles; calcified tissues; hairs; keratin fibers1
Biological Applications: Detecting Candida, lactic acid bacteria, microorganisms; treating gastropathy, viral diseases
Industrial Applications: Chemical mechanical polishing; inks; adhesives; ozone sensor; chemical warfare agent; detergents; coloring fabrics
Safety / Toxicity: Carcinogenicity; cytotoxicity; genotoxicity; fish toxicity; environmental pollutants; viral toxicity
Certification / Approval: Certified by Biological Stain Commission (BSC)
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