Agent Name

Sodium alizarinesulfonate

Alternative Name

Alizarin Red S

CAS Number




Major Category



2-Anthraquinonesulfonic acid, 3,4-dihydroxy-, sodium salt; 9,10-Dihydro-3,4-dihydroxy-9,10-dioxo-2-anthracenesulfonic acid monosodium salt; Acid Red Alizarine; Ahcoquinone Red S; Alizarin Carmine (biological stain); Alizarin Red S; Alizarin S; Alizarin-3-sulfonate sodium salt; Alizarine Carmine (Biological stain); Alizarine Carmine Indicator; Alizarine Red A; Alizarine Red AS; Alizarine Red For Wool; Alizarine Red Indicator; Alizarine Red S (biological stain); Alizarine Red S sodium salt; Alizarine Red SW; Alizarine Red SZ; Alizarine Red W; Alizarine Red WA; Alizarine Red WS; Alizarine S; Alizarine S Extra Conc. A Export; Alizarine S Extra Pure A; Alizarinrot-S [German]; Alizarinsulfonate; 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-dihydroxyanthraquinone-2-sulfonate; Sodium alizarin-3-sulfonate; 2-Anthracenesulfonic acid, 9,10-dihydro-3,4-dihydroxy-9,10-dioxo-, monosodium salt; 2-Anthracenesulfonic acid, 9,10-dihydro-3,4-dihydroxy-9,10-dioxo-, sodium salt (1:1); [ChemIDplus] Alizarin sulfonatesodium; 3,4-Dihydroxy-9,10-dioxo-2-anthracenesulfonic acid sodium salt; Alizarin Red, water soluble; Alizarin sodium monosulfonate; Alizarinsulfonic acid sodium salt; [Sigma-Aldrich MSDS]


Anthraquinone Dyes


Monohydrate: Orange-yellow solid; [Merck Index] Dark red powder; [Sigma-Aldrich MSDS]


Used as an acid-base indicator, reagent (fluorine determination), and microscopy stain; [Merck Index]


Intravenous LD50 (mouse) = 70 mg/kg; [RTECS] A moderate irritant; [Sigma-Aldrich MSDS]

Exposure Assessment
Vapor Pressure

1.06E-21 mm Hg

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Toxicity Information


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