9,9-Dimethyl-9H-fluorene-2-boronic Acid Pinacol Ester CAS 569343-09-5
| CAS No. | 569343-09-5 |
| Molecular Formula | C21H25BO2 |
| Molecular Weight | 320.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 9,9-Dimethyl-9H-fluorene-2-boronic Acid Pinacol Ester (CAS 569343-09-5), a certified reference material (molecular formula C21H25BO2, MW 320.23 g/mol) for analytical method development and quality control.
Structurally, 9,9-Dimethyl-9H-fluorene-2-boronic Acid Pinacol Ester (C21H25BO2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.5, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 320.23 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C21H25BO2 |
| Molecular Weight | 320.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 9.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
Related Dimethyl Standards
- 2-(9,9-Dimethyl-9H-fluoren-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1346007-02-0)
- 4,5-Dimethyl 1-[2-(4-fluorophenyl)-2-oxoethyl]-1H-imidazole-4,5-dicarboxylate (CAS 1638612-59-5)
- N~2~,1-dimethyl-3,5-dinitro-N~6~-(2-pyridinylmethyl)-1,4-dihydro-2,6-pyridinediamine (CAS 338777-95-0)
- Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate (CAS 1186376-95-3)
- Dimethyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)terephthalate (CAS 1186377-08-1)
- 1,2-Dimethyl 4-(tetramethyl-1,3,2-dioxaborolan-2-yl)phthalate (CAS 2157414-14-5)
- 4-(3,4-Dimethyl-6-oxopyrano[2,3-c]pyrazol-1(6H)-yl)benzenesulfonic acid (CAS 676246-99-4)
- Dimethyl 9,10-dihydro-9,10-ethenoanthracene-11,12-dicarboxylate (CAS 1625-82-7)
Recommended Standards
- 7-(2,6-Dioxopiperidin-3-yl)-4-fluoro-6H-[1,3]dioxolo[4,5-e]isoindole-6,8(7H)-dione (CAS 2667597-93-3)
- Bis[4-(trifluoromethyl)phenyl]methanol (CAS 22543-52-8)
- 6'-Bromo-2',3',4',9'-tetrahydrospiro[piperidine-4,1'-pyrido[3,4-b]indole] (CAS 2538165-07-8)
- Ethyl 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)spiro[3.5]non-2-ene-7-carboxylate (CAS 2864444-56-2)
- 4-(((2S,3S)-3-Propyloxiran-2-yl)methoxy)phenyl 4-(decyloxy)benzoate (CAS 107133-34-6)
- 10,12-Pentacosadiynoic acid 66990-32-7 pentacosa-10,12-diynoic acid (CAS 66990-32-7)
- (1R,4S)-7-Bromo-2,3,4,5-tetrahydro-1,4-methano-1H-1,5-benzodiazepine (CAS 1638604-47-3)
- 2,3-Dichloro-5-fluorophenacyl bromide (CAS 1806280-51-2)
- N-(2-Pyridinylmethyl)-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxamide HCl (CAS 1220035-40-4)
- (3S,4S)-4-Methylpyrrolidin-3-amine dihydrochloride (CAS 144124-90-3)
- 2,2'-(2-Fluoro-1,3-phenylene)diacetonitrile (CAS 175136-84-2)
- Methyl 4-((2S,3S)-3-((S)-2-((tert-butoxycarbonyl)(methyl)amino)propanamido)-8-cyano-5-((2-methoxynaphthalen-1-yl)methyl)-2-methyl-4-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepine-1-carbonyl)benzoate (CAS 2158322-16-6)
- Exatecan (CAS 171335-80-1)
- Semaglutide impurity 28 (CAS CATO-C4X-222628)
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