Alizarin Red S CAS 130-22-3
| CAS No. | 130-22-3 |
| Molecular Formula | C14H19O7S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Alizarin Red S is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Alizarin Red S (CAS 130-22-3), molecular formula C14H19O7SNa and molecular weight 354.35 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Alizarin Red S (C14H19O7SNa) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.5, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 354.35 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Alizarin Red S meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C14H19O7S Na |
| Molecular Weight | 354.35 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Alizarin Standards
- Alizarin complexone (CAS #N/A)
- Acid Alizarin Blue BB (CAS 10114-40-6)
- Alizarin Blue Black B (CAS 1324-21-6)
- Alizarin Yellow R, Sodium Salt (CAS 1718-34-9)
- Acid Alizarin Red B (CAS 1836-22-2)
- Acid Alizarin Violet N (CAS 2092-55-9)
- Alizarin complex indicator (CAS 3952-78-1)
- ALizarin complexone dihydrate (CAS 455303-00-1)
Recommended Standards
- 3-methyl-5-(methylsulfanyl)furan-2-carboxylic acid (CAS 2031259-10-4)
- Migalastat Impurity 1 (Lucerastat) (CAS 141206-42-0)
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- tert-Butyl 1-thia-2,7-diazaspiro[4.4]nonane-7-carboxylate 1,1-dioxide (CAS 1251020-53-7)
- 2-(Chloromethyl)-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4-amine dihydrochloride (CAS 1609409-38-2)
- 6'-Bromo-1',2'-dihydrospiro[oxane-4,3'-pyrrolo[3,2-b]pyridine]-2'-one (CAS 1190862-19-1)
- (R)-7-(Trifluoromethyl)chroman-4-amine (CAS 1213657-96-5)
- 5-(2,6-Dimethoxyphenyl)isoxazol-3-amine (CAS 1490823-74-9)
- 2,2,2-trifluoro-1-[4-(trifluoromethoxy)phenyl]ethan-1-amine (CAS 1270479-61-2)
- Antiarrhythmic peptide (cattle atrium) (CAS 81771-37-1)
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