Methyl 2-chloro-5-methylbenzoate CAS 16220-95-4
| CAS No. | 16220-95-4 |
| Molecular Formula | C9H9ClO2 |
| Molecular Weight | 184.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Methyl 2-chloro-5-methylbenzoate (CAS 16220-95-4), molecular formula C9H9ClO2 and molecular weight 184.62 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H9ClO2, Methyl 2-chloro-5-methylbenzoate 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 184.62 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).
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 | C9H9ClO2 |
| Molecular Weight | 184.62 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; 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.) | 1961 |
| Halogen Content | Cl-containing |
Related Methyl Standards
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Recommended Standards
- 4-Chloro-5-methoxy-2-methylbenzaldehyde (CAS 1616359-82-0)
- 3-Chloro-2,4-dimethylbenzoic acid (CAS 1632385-49-9)
- 6-Acetamido-3-chloro-2-picoline (CAS 160115-16-2)
- 4-Ethoxybenzoyl Chloride (CAS 16331-46-7)
- 2-(Chloromethyl)-5-cyano-3-(difluoromethyl)-4-iodopyridine (CAS 1807096-32-7)
- Naringin Hydrate (CAS 132203-74-8)
- 6-Methoxy-1H-pyrido[2,3-b][1,4]oxazin-2(3H)-one (CAS 1378342-69-8)
- Helicid (CAS 80154-34-3)
- 2,4-Dimethylpentan-3-amine hydrochloride (CAS 4083-58-3)
- Ethyl 3,3-difluoro-2,2-dimethylbutanoate (CAS 130021-57-7)
- tert-Butyl ((1-((S)-2-amino-3-methylbutanoyl)piperidin-2-yl)methyl)(ethyl)carbamate (CAS 1354024-11-5)
- 3-((4-Chloro-1H-pyrazol-1-yl)methoxy)benzaldehyde (CAS 1006460-35-0)
- 2-(4-Benzylpiperazin-1-yl)-6-fluorobenzaldehyde (CAS 159944-64-6)
- D-Trp25-Tirzepatide (CAS CATO-CPTD788909)
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