5-Chloro-2-methoxybenzene-1,3-dicarbaldehyde CAS 98299-14-0
| CAS No. | 98299-14-0 |
| Molecular Formula | C9H7ClO3 |
| Molecular Weight | 198.60 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 5-Chloro-2-methoxybenzene-1,3-dicarbaldehyde.
5-Chloro-2-methoxybenzene-1,3-dicarbaldehyde (CAS 98299-14-0), molecular formula C9H7ClO3 and molecular weight 198.60 g/mol, is a CATO reference standard with documented purity and traceability.
5-Chloro-2-methoxybenzene-1,3-dicarbaldehyde (C9H7ClO3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C9H7ClO3 |
| Molecular Weight | 198.60 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.) | 1985 |
| Halogen Content | Cl-containing |
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Recommended Standards
- 5-Chloro-2,3-dihydrobenzofuran-2-carboxylic Acid (CAS 34385-94-9)
- 6-Chloro-2,3-dihydrobenzofuran-2-carboxylic acid (CAS 26018-49-5)
- 5-chloro-2,3-dihydro-1-benzofuran-3-carboxylic acid (CAS 93670-12-3)
- 6-Chloro-4H-1,3-benzodioxine-8-carbaldehyde (CAS 63944-31-0)
- Ethyl 6-bromo-4-methylpyrazolo[1,5-a]pyridine-2-carboxylate (CAS 1822835-40-4)
- 1-(2,4-Dichloro-5-isopropoxyphenyl)-N-(3,4-dichlorophenyl)-5-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 400088-28-0)
- 344265-37-8 4-(2,4-difluorophenyl)-2-methyl-1lambda~4~,4-thiazinane-1,3,5-trione KS-00003CML (CAS 344265-37-8)
- (R)-1-(4-fluoro-3-methylphenyl)-2-methoxyethan-1-amine (CAS 1270153-18-8)
- 4-Bromo-1-(pyrrolidin-3-yl)-1H-pyrazole (CAS 1247439-25-3)
- 2-(2-Aminophenoxy)acetic acid (CAS 4323-68-6)
- N-(4-fluorophenyl)-1-methyl-3-(trifluoromethyl)-5-(3-(trifluoromethyl)phenoxy)-1H-pyrazole-4-carboxamide (CAS 158712-61-9)
- 1-Chloro-5-fluoro-4-iodo-2-methylbenzene (CAS 1126424-32-5)
- Citalopram Impurity 55 (CAS CATO-C4X-110955)
- Integrin Binding Peptide trifluoroacetate salt (CAS 278792-07-7)
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