4,5-Dichlorophthalaldehyde CAS 13209-33-1
| CAS No. | 13209-33-1 |
| Molecular Formula | C8H4Cl2O2 |
| Molecular Weight | 203.02 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C8H4Cl2O2, 4,5-Dichlorophthalaldehyde contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 203.02 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
4,5-Dichlorophthalaldehyde (CAS 13209-33-1), molecular formula C8H4Cl2O2 and molecular weight 203.02 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.
As a certified reference material (CRM), 4,5-Dichlorophthalaldehyde 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 | C8H4Cl2O2 |
| Molecular Weight | 203.02 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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.) | 1960 |
| Halogen Content | Cl-containing |
Recommended Standards
- 2-Chlorophenyloxoacetyl chloride (CAS 1159373-66-6)
- 2-(2,5-Dichlorophenyl)-2-oxoacetaldehyde (CAS 38923-37-4)
- 6,7-dichloro-2,3-dihydro-1-benzofuran-3-one (CAS 1153450-05-5)
- 2-(2,6-Dichlorophenyl)-2-oxoacetaldehyde (CAS 53216-17-4)
- 1-Phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole-4-carbohydrazide (CAS 94692-06-5)
- Methyl 2-bromo-2-phenylpropanoate (CAS 84892-13-7)
- {[1-(2-methoxyethyl)-3,5-dimethyl-1H-pyrazol-4-yl]methyl}(methyl)amine (CAS 1156282-67-5)
- 2-Chloro-1,5-dihydroxyanthracene-9,10-dione (CAS 61601-42-1)
- 1-(4-Bromophenyl)-N-{[3-(trifluoromethyl)phenyl]methyl}-1H-pyrrole-2-carboxamide (CAS 477858-93-8)
- (1-((3,5-Dimethylisoxazol-4-yl)methyl)piperidin-4-yl)methanamine (CAS 1239777-91-3)
- 4-Methyl-2-sulfamoyl-benzoic acid (CAS 1242134-20-8)
- 1-(Piperidin-4-yl)cyclopentanol (CAS 949100-21-4)
- 4-Oxo-1H,2H,3H,3aH,4H,5H-pyrrolo[1,2-a]quinoxaline-7-carboxylic acid (CAS 1008665-68-6)
- Exenatide (CAS 141758-74-9（free base）)
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