2,3,6,7-Tetramethoxy-9,9-dimethyl-9H-fluorene CAS 1176891-87-4
| CAS No. | 1176891-87-4 |
| Molecular Formula | C19H22O4 |
| Molecular Weight | 314.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2,3,6,7-Tetramethoxy-9,9-dimethyl-9H-fluorene 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.
2,3,6,7-Tetramethoxy-9,9-dimethyl-9H-fluorene (CAS 1176891-87-4), molecular formula C19H22O4 and molecular weight 314.38 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2,3,6,7-Tetramethoxy-9,9-dimethyl-9H-fluorene (C19H22O4) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 314.38 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).
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.
Physical & Chemical Properties
| Molecular Formula | C19H22O4 |
| Molecular Weight | 314.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
Related Tetramethoxy Standards
- 1,3,7,9-Tetramethoxy-2,6-dimethyldibenzo[b,d]furan (CAS 24565-66-0)
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- 3,3',5,5'-Tetramethoxy-[1,1'-biphenyl]-4,4'-diol (CAS 612-69-1)
- 2,2’,5,5’-tetramethoxy-1,1’-biphenyl-4,4’-diamine (CAS 23071-40-1)
- 2,3,5,6-Tetramethoxy-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2096995-77-4)
- 2,3,6,7-Tetramethoxy-9,10-dimethylanthracene (CAS 13985-15-4)
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