72088-94-9 3',6'-Dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-ar-carboxylic acid Spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-ar-carboxylic acid, 3',6'-dihydroxy-3-oxo- EINECS 276-331-1 CAS 72088-94-9
| CAS No. | 72088-94-9 |
| Molecular Formula | 2*C21H30O7 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C21H30O7, 72088-94-9 3',6'-Dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-ar-carboxylic acid Spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-ar-carboxylic acid, 3',6'-dihydroxy-3-oxo- EINECS 276-331-1 contains a flavonoid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 394.46 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
72088-94-9 3',6'-Dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthene)-ar-carboxylic acid Spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-ar-carboxylic acid, 3',6'-dihydroxy-3-oxo- EINECS 276-331-1 (CAS 72088-94-9), molecular formula C21H30O7 and molecular weight 394.46 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | 2*C21H30O7 |
| Molecular Weight | 394.46 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
Related Dihydroxy Standards
- Ethyl 2,2-dihydroxy-4-ethoxy-3-oxobutanoate (CAS 1000018-28-9)
- Ethyl 4,6-dihydroxy-2-oxo-2H-chromene-3-carboxylate (CAS 100037-65-8)
- Ethyl 4,7-dihydroxy-2-oxo-2H-chromene-3-carboxylate (CAS 100037-66-9)
- Ethyl 4,8-dihydroxy-2-oxo-2H-chromene-3-carboxylate (CAS 100037-67-0)
- 1-(2,4-Dihydroxy-3,6-dimethoxyphenyl)-3-(2-methoxyphenyl)prop-2-en-1-one 100079-39-8 ST24037017 (CAS 100079-39-8)
- 2,3-Dihydroxy-3-(4-hydroxyphenyl)propanoic acid (CAS 100201-57-8)
- 1,4-Dihydroxy-5,8-bis(methylamino)anthracene-9,10-dione (CAS 100495-28-1)
- 1,4-Dihydroxy-5,8-bis(propylamino)anthracene-9,10-dione (CAS 100495-30-5)
Recommended Standards
- 6-(2,6-Difluorophenyl)pyridazin-3-amine (CAS 1250246-22-0)
- 1-(2-amino-5-bromophenyl)propan-1-one (CAS 124623-15-0)
- 2-Heptyne (CAS 1119-65-9)
- 3-(Trifluoromethyl)-1H-pyrrolo[2,3-b]pyridin-4-amine (CAS 1255099-01-4)
- 3-Isopropenyl-6-oxoheptanal (CAS 7086-79-5)
- 2-Phenyl-N-(thiophen-2-yl)morpholine-4-carboxamide (CAS 1210382-75-4)
- 1H,1H-Perfluorooctyl trifluoromethanesulfonate (CAS 17352-09-9)
- 5-Bromo-3-iodo-1H-pyrrolo[3,2-b]pyridine (CAS 1190319-16-4)
- Phenylacetylene (CAS 536-74-3)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
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