2-(11-Hydroxy-3-oxo-3H-dibenzo[c,h]xanthen-7-yl)benzoic acid CAS 51517-45-4
| CAS No. | 51517-45-4 |
| Molecular Formula | C28H16O5 |
| Molecular Weight | 432.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(11-Hydroxy-3-oxo-3H-dibenzo[c,h]xanthen-7-yl)benzoic acid (C28H16O5) contains a steroid core, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
2-(11-Hydroxy-3-oxo-3H-dibenzo[c,h]xanthen-7-yl)benzoic acid (CAS 51517-45-4), molecular formula C28H16O5 and molecular weight 432.42 g/mol, is a CATO reference standard with documented purity and traceability.
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), 2-(11-Hydroxy-3-oxo-3H-dibenzo[c,h]xanthen-7-yl)benzoic acid 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 | C28H16O5 |
| Molecular Weight | 432.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 21.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
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Recommended Standards
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- TERT-BUTYL 2,2,3,3,9,9,10,10-OCTAMETHYL-4,8-DIOXA-3,9-DISILAUNDECAN-6-YLCARBAMATE (CAS 1951440-94-0)
- 2-Chloro-5-(4-hexyloxybenzoyl)pyridine (CAS 1187169-66-9)
- 5-(Benzofuran-2-yl)-1,3,4-oxadiazol-2(3H)-one (CAS 78620-33-4)
- Semaglutide impurity 289 (CAS CATO-C4X-2226289)
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