4-(4-Hydroxyphenoxy)-3,5-diiodobenzoic Acid CAS 1838-55-7
| CAS No. | 1838-55-7 |
| Molecular Formula | C13H8I2O4 |
| Molecular Weight | 482.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(4-Hydroxyphenoxy)-3,5-diiodobenzoic Acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-(4-Hydroxyphenoxy)-3,5-diiodobenzoic Acid (CAS 1838-55-7), molecular formula C13H8I2O4 and molecular weight 482.01 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C13H8I2O4, 4-(4-Hydroxyphenoxy)-3,5-diiodobenzoic Acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 482.01 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C13H8I2O4 |
| Molecular Weight | 482.01 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | I-containing |
Related Hydroxyphenoxy Standards
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- Methyl 2-(4-(4-hydroxyphenoxy)-3-iodophenyl)acetate (CAS 471248-25-6)
- 4-(4-Hydroxyphenoxy)-3-(pyrrolidin-1-yl)-5-sulfamoylbenzoic acid (CAS 90683-83-3)
- 1-[2-(4-hydroxyphenoxy)ethyl]-4-[(4-methylphenyl)methyl]piperidin-4-ol (CAS 193359-26-1)
- 2-(2’-Hydroxyphenoxy)-4-nitro-benzophenone-13C6 (CAS 1330180-90-9)
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Recommended Standards
- GW 803430 (CAS 515141-51-2)
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- 3-Methyl-N-(4-sulfamoylphenyl)benzamide (CAS 304666-35-1)
- 1-[Chloro(difluoro)methoxy]-2,3,4-trifluoro-benzene (CAS 1404194-77-9)
- 1-(3-(Aminomethyl)tetrahydro-2h-pyran-3-yl)cyclobutan-1-ol (CAS 1691627-70-9)
- (4-Isopropylphenyl)(2-methylpyridin-4-yl)methanone (CAS 1187171-25-0)
- 4-Bromo-3-methyl-7-(trifluoromethyl)-1H-indazole (CAS 1824271-01-3)
- tert-Butyl 4-(3-methylureido)piperidine-1-carboxylate (CAS 1233955-69-5)
- 2-[(1,3-dimethyl-1h-pyrazol-4-yl)methoxy]aniline (CAS 1006467-29-3)
- O-(3-Cyano-6-(thiophen-2-yl)-4-(trifluoromethyl)pyridin-2-yl) O,O-diethyl phosphorothioate (CAS 286435-85-6)
- 7-bromo-5-fluoro-1,2,3,4-tetrahydroquinoline hydrochloride (CAS 1432681-93-0)
- Semaglutide impurity 206 (CAS CATO-C4X-2226206)
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