4-Iodo-2-methoxybenzoic acid CAS 89942-34-7
| CAS No. | 89942-34-7 |
| Molecular Formula | C8H7IO3 |
| Molecular Weight | 278.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Iodo-2-methoxybenzoic acid (CAS 89942-34-7), molecular formula C8H7IO3 and molecular weight 278.04 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution, an aromatic ring system, 4-Iodo-2-methoxybenzoic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 278.04 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C8H7IO3 |
| Molecular Weight | 278.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | I-containing |
Related Iodo Standards
- 2-Iodo-3-methoxybenzoic acid (CAS 50627-31-1)
- 2-Iodo-6-methoxybenzoic Acid (CAS 66195-39-9)
- 3-Iodo-2-methoxybenzoic acid (CAS 879498-16-5)
- 3-Iodo-4-methoxybenzoic Acid (CAS 68507-19-7)
- 3-Iodo-5-methoxybenzoic acid (CAS 74440-82-7)
- 4-Iodo-3-methoxybenzoic acid (CAS 282087-44-9)
- 5-Iodo-2-methoxybenzoic acid (CAS 2786-00-7)
- (5-Iodo-pyridin-3-yl)-carbamic Acid Methyl Ester (CAS 1167056-06-5)
Recommended Standards
- 4-Hydroxy-5-iodo-2-methylbenzoic acid (CAS 201810-63-1)
- 5-(Hydroxymethyl)-6-iodo-1,3-benzodioxole (CAS 69048-76-6)
- 5-Hydroxy-2-iodo-4-methoxybenzaldehyde (CAS 69048-73-3)
- 3,4-dichloro-1-(3,4-difluorophenyl)-1H-pyrrole-2,5-dione (CAS 281223-54-9)
- Copper(II) diphosphate (CAS 15191-80-7)
- 2-(2-Fluorophenyl)thiazolidin-4-one (CAS 883014-09-3)
- 2-(Methylamino)-4-(methylsulfanyl)butanamide (CAS 1218141-31-1)
- Elobixibat Impurity 34 (CAS CATO-C4X-283834)
- Thiolane-2-carboxylic acid (CAS 19418-11-2)
- 5-Aminotetrahydro-2H-pyran-3-carboxylic acid (CAS 1782547-02-7)
- Isavuconazole Impurity 71 (CAS CATO-C4X-123671)
- Pyridin-2-ylmethyl (5-iodo-3-methylisothiazol-4-yl)carbamate (CAS 1423701-94-3)
- 1-(3-Benzyloxypropyl)-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (CAS 1309960-92-6)
- [Ser]8-Acetylated Semaglutide (CAS CATO-C4X-2226218)
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