Alizarin Red S AR (pH Indicator) (C.I. No. 58005) / CAS 130-22-3
Alizarin Red S AR is an analytical reagent grade dye and pH indicator. Molecular formula: C14H7NaO7S.
| CAS No. | 130-22-3 |
|---|---|
| Molecular formula | C14H7NaO7S |
| Molecular weight | 342.3 |
| Shelf life | 5 years |
| Appearance | Red powder |
| Grade | AR |
| Available pack sizes | 25 gm, 100 gm |
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Product Details
Alizarin Red S AR (C.I. 58005), also known as sodium alizarine sulphonate, is an analytical reagent grade dye and pH indicator.
Product Details
| Supplier article no. | A-00426 |
|---|---|
| CAS No. | 130-22-3 |
| HSN Code | 38220090* |
| Grade | AR |
| Purity | Not specified |
| Molecular formula | C14H7NaO7S |
| Molecular weight | 342.3 |
| Shelf life | 5 years |
| Appearance | Red powder |
| Loss on drying at 110�C | Max. 5% |
| Initial boiling point | 287�C |
| Melting point | 430�C |
| Solubility in water | Sparingly soluble |
| Dye content by spectrophotometry on dried substance | Min. 70% |
| pH transition range 4.3-6.3 | Brilliant yellow to pink |
| pH transition range 9.4-12.0 | Brown orange to violet |
| Absorptivity A1%/1cm at 556 nm | Min. 350.0 |
| Absorptivity A1%/1cm at 595 nm | Min. 325.0 |
| Absorption maxima in 0.1 N NaOH | 553-559 nm and 592-599 nm |
| Available pack sizes | 25 gm, 100 gm |
Applications
Used as an analytical reagent grade pH indicator in laboratory procedures. Alizarin Red S is also used in some research assays to detect calcium-rich mineral deposition; suitability depends on the sample and validated protocol.
For laboratory use. Follow the applicable procedure and safety documentation.