Alizarin Red is a synthetic, water-soluble anthraquinone dye primarily used as a biological stain for the detection and quantification of calcium deposits in tissues and cell cultures. It is derived from the alizarin (1,2-dihydroxyanthraquinone) by sulfonation. Its vivid red coloration and pH sensitivity make it a versatile tool for both qualitative and quantitative assays. 
CAS No.: 130-22-3
Synonyms: Alizarin Red S, 3,4-Dihydroxy-9,10-dioxo-2-anthracenesulfonic acid sodium salt, Alizarin Carmine, Alizarin Red, water soluble, Alizarin sodium monosulfonate, Alizarin sulfonate sodium, Alizarinsulfonic acid sodium salt, Sodium alizarinsulfonate
| Physical Properties | |
| Chemical formula | C14H7O7S•Na |
| IUPAC Name | Sodium 3,4-Dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate |
| Chemical Class | Anthraquinone dye |
| Solubility | Slightly soluble in ethanol; insoluble in acetone, ether |
| Chemical Properties | |
| Colour | Yellow-orange |
| State | Solid Powder |
| Molecular Mass | 342.25 g/mol |
| Pictograms : |  |
| Hazard Statements : | H315 Causes skin irritation. |
| Precautionary statements : | P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection. P312 Call a POISON CENTRE/doctor if you feel unwell. P321 Specific treatment (see on this label). P403+P233 Store in a well-ventilated place. Keep container tightly closed. P501 Dispose of contents/container to industrial combustion plant. |
Alizarin Red is a synthetic, water-soluble anthraquinone dye primarily used as a biological stain for the detection and quantification of calcium deposits in tissues and cell cultures. It is derived from the alizarin (1,2-dihydroxyanthraquinone) by sulfonation. Its vivid red coloration and pH sensitivity make it a versatile tool for both qualitative and quantitative assays.
CAS No.: 130-22-3
Synonyms: Alizarin Red S, 3,4-Dihydroxy-9,10-dioxo-2-anthracenesulfonic acid sodium salt, Alizarin Carmine, Alizarin Red, water soluble, Alizarin sodium monosulfonate, Alizarin sulfonate sodium, Alizarinsulfonic acid sodium salt, Sodium alizarinsulfonate
| Physical Properties | |
| Chemical formula | C14H7O7S•Na |
| IUPAC Name | Sodium 3,4-Dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonate |
| Chemical Class | Anthraquinone dye |
| Solubility | Slightly soluble in ethanol; insoluble in acetone, ether |
| Chemical Properties | |
| Colour | Yellow-orange |
| State | Solid Powder |
| Molecular Mass | 342.25 g/mol |
| Pictograms : | |
| Hazard Statements : | H315 Causes skin irritation. |
| Precautionary statements : | P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection. P312 Call a POISON CENTRE/doctor if you feel unwell. P321 Specific treatment (see on this label). P403+P233 Store in a well-ventilated place. Keep container tightly closed. P501 Dispose of contents/container to industrial combustion plant. |
Alizarin Red is an anthraquinone dye primarily used as a biological stain for detecting and quantifying calcium deposits in cell cultures and tissue sections. It is essential in bone and cartilage research, mineralization studies, and is also used as a textile dye and analytical reagent.
Alizarin Red is generally an orange to yellow-orange powder, while in staining applications, it produces orange-red to red coloration in calcium-containing areas. Its observed color can vary with pH and binding environment.
Alizarin is the parent anthraquinone compound, while Alizarin Red S is a sulfonated sodium salt derivative of alizarin. The sulfonate group makes Alizarin Red S more water-soluble and more suitable for routine biological staining.
Alizarin Red S is not a triphenylmethane dye. It is an anthraquinone-based dye, derived from 1,2-dihydroxyanthraquinone (alizarin).
