Isophthalic Acid, Bis-n-Octyl Ester CAS 4654-18-6
| CAS No. | 4654-18-6 |
| Molecular Formula | C24H38O4 |
| Molecular Weight | 390.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Isophthalic Acid, Bis-n-Octyl Ester (CAS 4654-18-6), molecular formula C24H38O4 and molecular weight 390.56 g/mol, is a CATO reference standard with documented purity and traceability.
Isophthalic Acid, Bis-n-Octyl Ester (C24H38O4) 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 high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), Isophthalic Acid, Bis-n-Octyl Ester 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.
Physical & Chemical Properties
| Molecular Formula | C24H38O4 |
| Molecular Weight | 390.56 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Isophthalic Standards
- Isophthalic Acid, Bis-Methyl Ester (CAS 1459-93-4)
- Isophthalic acid-carboxy-<SUP>13</SUP>C<SUB>2</SUB> (CAS 112043-90-0)
- Isophthalic-2,4,5,6-d4 Acid (CAS 148472-48-4)
- Isophthalic Acid (CAS 121-91-5)
- Isophthalic acid compound with nonanedioic acid and dimethyl terephthalate and 2,2-dimethylpropane-1,3-diol and ethane-1,2-diol (1:1:1:1:1) (CAS 75701-44-9)
Recommended Standards
- 5-β-Cholanic Acid-3α-ol-6-one (CAS 2393-61-5)
- Bis(2-ethylhexyl) Isophthalate (CAS 137-89-3)
- Deoxycholic acid Impurity 19 (CAS CATO-C4X-335919)
- Diethylhexyl Phthalate (DEHP) (CAS 117-81-7)
- 1-(4,4-Dimethylpiperidin-1-yl)-2,2-dimethylpropan-1-one (CAS 1342838-33-8)
- 3,3'-Diamino-4,4'-dihydroxydiphenyl sulfone (CAS 7545-50-8)
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- 2-Ethoxypyrimidin-4(3H)-one (CAS 25957-58-8)
- 3-Bromo-2-chlorobenzene-1-sulfonyl chloride (CAS 100191-17-1)
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- (S)-2-Amino-3-(3-fluoropyridin-4-yl)propanoic acid (CAS 1270152-20-9)
- Antiarrhythmic peptide (cattle atrium) (CAS 81771-37-1)
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