2-Chloro-4,5-dimethylbenzaldehyde CAS 1537135-84-4
| CAS No. | 1537135-84-4 |
| Molecular Formula | C9H9ClO |
| Molecular Weight | 168.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Chloro-4,5-dimethylbenzaldehyde (C9H9ClO) contains a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; 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-Chloro-4,5-dimethylbenzaldehyde (CAS 1537135-84-4), molecular formula C9H9ClO and molecular weight 168.62 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C9H9ClO |
| Molecular Weight | 168.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Halogen Content | Cl-containing |
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Recommended Standards
- 5-Chloro-2,4-dimethylbenzaldehyde (CAS 1522949-87-6)
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- 2-chloro-4-cyclopropylphenol (CAS 1553103-02-8)
- 5-Bromo-1-(phenylsulfonyl)-1H-pyrrolo[2,3-c]pyridine-2-carbaldehyde (CAS 1227269-19-3)
- Methyl 3-fluoro-4-methyl-2-(methylsulfanyl)benzoate (CAS 2145093-90-7)
- Benzyl 3-fluoro-4-hydroxyazocane-1-carboxylate (CAS 2010092-43-8)
- 1-(Quinolin-2-ylsulfanyl)propan-2-one (CAS 13896-81-6)
- 2-[(2R,5S)-5-(Acetylamino-methyl)-pyrrolidin-2-yl]-N-methyl-acetamide (CAS 1442080-82-1)
- 2-(Piperidin-1-yl)-N-(thiophen-2-ylmethyl)ethan-1-amine (CAS 1249301-85-6)
- 6-Methyl-2,3-diphenyl-7,8-dihydroimidazo[1,2-b]pyridazine (CAS 89004-11-5)
- 4-Benzyl-2-(trifluoromethyl)oxazol-5(2H)-one (CAS 2261-95-2)
- Nε-(2,4-Dinitrophenyl)-L-lysine Hydrochloride (CAS 14401-10-6)
- D-Phe22-Tirzepatide (CAS CATO-CPTD788912)
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