Phthalic acid, bis-7-methyloctyl ester CAS 20548-62-3
| CAS No. | 20548-62-3 |
| Molecular Formula | C26H42O4 |
| Molecular Weight | 418.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Phthalic acid, bis-7-methyloctyl ester.
Phthalic acid, bis-7-methyloctyl ester (CAS 20548-62-3), molecular formula C26H42O4 and molecular weight 418.61 g/mol, is a CATO reference standard with documented purity and traceability.
Phthalic acid, bis-7-methyloctyl ester (C26H42O4) contains a steroid core, a hydroxyl group, an ether linkage. 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).
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 | C26H42O4 |
| Molecular Weight | 418.61 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Phthalic Standards
- Phthalic acid, bis-2-methyloctyl ester (CAS 70857-56-6)
- Phthalic acid, octyldecyl ester (CAS 119-07-3)
- Phthalic Acid, Bis-Isononyl Ester (CAS 68515-48-0)
- Phthalic acid, bis[2-(2-ethoxyethoxy)ethyl] ester (CAS 117-85-1)
- Phthalic Acid Bis(3,7-dimethyloctyl) Ester (CAS 316808-86-3)
- Phthalic acid, bis-8-methylnonyl ester (CAS 89-16-7)
- Phthalic Acid, Bis-Isodecyl Ester (CAS 26761-40-0)
- Phthalic Acid Bis(3,7-dimethyloctyl) Ester-d4 (CAS 1398065-81-0)
Recommended Standards
- Maxacalcitol Impurity 8 (CAS 929721-98-2)
- Maxacalcitol Impurity 7 (CAS CATO-C4X-27887)
- Diisononyl Phthalate (CAS 28553-12-0)
- Maxacalcitol Impurity 4 (CAS 338956-39-1)
- 1,2,3,4-tetrahydronaphthalene-2,6-diamine dihydrochloride (CAS 861333-04-2)
- 2-(3-Chloro-4-hydroxybenzylidene)malononitrile (CAS 159102-16-6)
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- 3-Methyl Hippuric Acid-d7 (CAS 1216551-07-3)
- N'-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-2-(2-nitroethyl)benzohydrazide (CAS 338770-92-6)
- 2-(Aminomethyl)-3-hydroxy-N,N-dimethylbenzamide (CAS 1243284-41-4)
- 1-(2-Methoxyethyl)-6-oxo-2-(o-tolyl)piperidine-3-carboxylic acid (CAS 1212279-09-8)
- 6-Amino-2,3,4-trifluorobenzoic acid (CAS 1196151-13-9)
- 6-Chloro-3-(4-isopropylphenyl)-2-methylquinazoline-4(3H)-thione (CAS 823195-68-2)
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