3,3,3',3'-Tetramethyl-5,5',6,6'-tetrapropoxy-2,2',3,3'-tetrahydro-1,1'-spirobi[indene] CAS 89929-65-7
| CAS No. | 89929-65-7 |
| Molecular Formula | C33H48O4 |
| Molecular Weight | 508.73 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,3,3',3'-Tetramethyl-5,5',6,6'-tetrapropoxy-2,2',3,3'-tetrahydro-1,1'-spirobi[indene] (C33H48O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
3,3,3',3'-Tetramethyl-5,5',6,6'-tetrapropoxy-2,2',3,3'-tetrahydro-1,1'-spirobi[indene] (CAS 89929-65-7), molecular formula C33H48O4 and molecular weight 508.73 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 | C33H48O4 |
| Molecular Weight | 508.73 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
Related Tetramethyl Standards
- Ethyl4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1-(triphenylmethyl)-1h-pyrazole-3-carboxylate (CAS 2170134-91-3)
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- 9-(4-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)naphthalen-1-yl)-9H-carbazole (CAS 2376616-77-0)
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Recommended Standards
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- Chloro[(4-methylphenyl)diphenylphosphine]gold (CAS 107198-68-5)
- 4,4'-Bis(decyloxy)-3-methylazobenzene (CAS 1627844-78-3)
- 2-Bromo-1-ethoxy-4-(trifluoromethoxy)benzene (CAS 200956-50-9)
- (3-(7H-Benzofuro[2,3-b]carbazol-7-yl)phenyl)boronic acid (CAS 1369587-56-3)
- 4-Chloro-N-[(4-methoxyphenyl)methyl]benzene-1-sulfonamide (CAS 349397-05-3)
- tert-Butyl (E)-2-(1-(3,5-dibromothiophen-2-yl)ethylidene)hydrazine-1-carboxylate (CAS 864774-20-9)
- N-(4-Guanidinobutyl)tetradecanamide (CAS 160854-59-1)
- 6-Ethoxy-2-(3-iodophenyl)-2H-benzo[d][1,2,3]triazol-5-amine (CAS 1706465-07-7)
- Methyl 5-aminobenzo[d]thiazole-2-carboxylate (CAS 1514255-90-3)
- 6,7-Dimethyl-2,3-dihydro-1-benzofuran-3-amine hydrochloride (CAS 1258649-70-5)
- 5-PAHSA (CAS 1481636-41-2)
- Hexapeptide-10 (CAS 146439-94-3)
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