3-Formyl-4-hydroxy-5-iodobenzoic acid CAS 33257-38-4
| CAS No. | 33257-38-4 |
| Molecular Formula | C8H5IO4 |
| Molecular Weight | 292.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 3-Formyl-4-hydroxy-5-iodobenzoic acid (CAS 33257-38-4), a certified reference material (molecular formula C8H5IO4, MW 292.03 g/mol) for analytical method development and quality control.
Based on its molecular formula C8H5IO4, 3-Formyl-4-hydroxy-5-iodobenzoic 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 292.03 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 3-Formyl-4-hydroxy-5-iodobenzoic acid 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 | C8H5IO4 |
| Molecular Weight | 292.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | I-containing |
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Recommended Standards
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- 4-Iodoisophthalic acid (CAS 46194-50-7)
- 3-Amino-7-bromoindolin-2-one (CAS 1249852-68-3)
- 1-Acetyl-1,2,3,4-tetrahydroquinolin-7-amine hydrochloride (CAS 1417355-08-8)
- (2-Methoxyethyl)[(naphthalen-1-yl)methyl]amine (CAS 884497-43-2)
- 3-(4-Chlorophenyl)-N,N-dimethyl-4-oxo-3,4-dihydrophthalazine-1-carboxamide (CAS 339021-29-3)
- 3-(tert-Butoxycarbonylamino)tetrahydrothiophene-3-carboxylic acid (CAS 108329-86-8)
- N'-(3-chloropropanoyl)-3-fluorobenzohydrazide (CAS 1823182-50-8)
- tert-Butyl n-(2-sulfamoylethyl)carbamate (CAS 1375279-51-8)
- Bis(furan-2-ylmethyl) (methylenebis(4,1-phenylene))dicarbamate (CAS 60387-40-8)
- 3-(2-Aminoethyl)-1,3-oxazolidin-2-one hydrochloride (CAS 1262773-49-8)
- Semaglutide impurity 233 (CAS CATO-C4X-2226233)
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