Acid Red 9 CAS 5850-95-3
| CAS No. | 5850-95-3 |
| Molecular Formula | C20H14N2O4S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Acid Red 9.
Acid Red 9 (CAS 5850-95-3), molecular formula C20H14N2O4SNa and molecular weight 401.39 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Acid Red 9 (C20H14N2O4SNa) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 401.39 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.
CATO manufactures Acid Red 9 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C20H14N2O4S Na |
| Molecular Weight | 401.39 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- Ethyl 4-amino-4-methylpentanoate (CAS 1250519-23-3)
- 5-(2-Hydroxy-phenyl)-isoxazole-3-carboxylic acid (CAS 33282-12-1)
- (4-Aminopiperidin-1-yl)(1H-pyrazol-3-yl)methanone (CAS 1247583-58-9)
- 4-(Sec-butyl)benzenesulfonamide (CAS 91252-28-7)
- 3-Bromo-2-fluoro-5-methylaniline (CAS 1207319-71-8)
- n-(4-Bromo-2-fluorophenyl)-3,5-dimethylisoxazole-4-carboxamide (CAS 854023-65-7)
- 2-(Furan-2-yl)-2-{[4-(trifluoromethyl)phenyl]amino}acetonitrile (CAS 325139-63-7)
- Ethyl 4-(1,3-dioxoisoindolin-2-yl)benzoate (CAS 130872-52-5)
- 5-(2-chloro-4-fluorophenyl)-5-methylimidazolidine-2,4-dione (CAS 1258650-66-6)
- Tirzepatide Impurity 19 X TFA Salt (CAS CATO-C4X-324019)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com