2,5-Dichloro-4-methoxybenzaldehyde CAS 381229-74-9
| CAS No. | 381229-74-9 |
| Molecular Formula | C8H6Cl2O2 |
| Molecular Weight | 205.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,5-Dichloro-4-methoxybenzaldehyde (C8H6Cl2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. 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. 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).
2,5-Dichloro-4-methoxybenzaldehyde (CAS 381229-74-9), molecular formula C8H6Cl2O2 and molecular weight 205.04 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C8H6Cl2O2 |
| Molecular Weight | 205.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 2025 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
- 3,5-Dichloro-2-methyl-benzoic acid (CAS 101567-48-0)
- 3,6-Dichloro-N-methyl-2-pyridinecarboxamide (CAS 1021077-12-2)
- 3’,4’-Dichloro-2-hydroxyacetophenone (CAS 113337-38-5)
- 2,5-Dichloro-3-methylbenzoic acid (CAS 1160573-37-4)
- 2,3-Dichloro-4-methylbenzoic acid (CAS 1254073-62-5)
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- 2,4-Dichloro-5,8-dihydro-6H-pyrano[3,4-d]pyrimidine (CAS 1269461-25-7)
Recommended Standards
- 2,4-Dichloro-N-hydroxybenzimidamide (CAS 22179-80-2)
- 2,5-Dichloro-4-methylbenzoic acid (CAS 21460-88-8)
- 2,4-Dichlorobenzoylhydrazine (CAS 5814-06-2)
- 2,5-Dichlorobenzohydrazide (CAS 67487-35-8)
- 2-(1-Methyl-1,2,3,4-tetrahydroquinolin-6-yl)-2-(piperidin-1-yl)ethan-1-amine (CAS 1171880-01-5)
- 8-Chloro-5-fluoro-2-(trifluoromethyl)quinolin-4-ol (CAS 917251-94-6)
- Ethyl (1-oxidopyridin-3-yl)acetate (CAS 3423-47-0)
- 5-Fluoro-3-(methoxymethoxy)naphthalen-1-yl trifluoromethanesulfonate (CAS 2773311-34-3)
- 2-Bromo-6-iodoisonicotinaldehyde (CAS 1289035-18-2)
- 6-Methyl-3-(thiophen-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine (CAS 1708437-09-5)
- Acotiamide Impurity 1 (CAS CATO-C4X-11141)
- 2-Phenyl[1,3]oxazolo[5,4-b]pyridine-6-carboxylic acid (CAS 927801-31-8)
- 2-Amino-3-(2-pyrrolyl)propionic Acid (CAS 3078-36-2)
- Peptide 74 (H-8545.0500) (CAS 132116-39-3)
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