2-Chloro-4-methylbenzoic Acid CAS 7697-25-8
| CAS No. | 7697-25-8 |
| Molecular Formula | C8H7ClO2 |
| Molecular Weight | 170.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Chloro-4-methylbenzoic Acid (CAS 7697-25-8), molecular formula C8H7ClO2 and molecular weight 170.59 g/mol, is a CATO reference standard with documented purity and traceability.
2-Chloro-4-methylbenzoic Acid (C8H7ClO2) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), 2-Chloro-4-methylbenzoic Acid 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 | C8H7ClO2 |
| Molecular Weight | 170.59 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.) | 1959 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- 3-Chloro-4-hydroxy-5-methylbenzaldehyde (CAS 107356-10-5)
- 6-chloro-2,3-dihydro-1-benzofuran-3-ol (CAS 1154740-97-2)
- 4-chloro-2-(difluoromethyl)pyrimidine (CAS 1261453-07-9)
- 2-Chloro-5-(hydroxymethyl)benzaldehyde (CAS 1288998-81-1)
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Recommended Standards
- 2-Chloro-4-methoxybenzaldehyde (CAS 54439-75-7)
- 2-Chloro-5-hydroxy-4-methylbenzaldehyde (CAS 860753-80-6)
- 2-(4-Chlorophenoxy)acetaldehyde (CAS 43018-72-0)
- 2-Chloro-5-methylbenzoic Acid (CAS 6342-60-5)
- 2-(3-Methoxy-4-(pentyloxy)phenyl)-1H-imidazo[4,5-b]phenazine (CAS 114991-96-7)
- 2-(2-Benzyloxyethyl)-1-BOC-azetidine-2-carboxylic acid (CAS 2055119-14-5)
- 3-(8-Methoxy-2-oxo-2H-chromen-3-yl)propanoic acid (CAS 1365940-75-5)
- (S)-Benzyl 3-formylpiperidine-1-carboxylate (CAS 405063-39-0)
- Diethyl 1,2-Phenylenedicarbamate (CAS 6324-13-6)
- 1-Bromo-3-(chloromethyl)bicyclo[1.1.1]Pentane (CAS 137741-18-5)
- 5-(5-{[3-(4-Bromophenyl)-2-imino-4-oxo-1,3-thiazolidin-5-ylidene]methyl}-2-furyl)-1H-isoindole-1,3(2H)-dione (CAS 1420071-30-2)
- Ipratropium Bromide (CAS 22254-24-6)
- Methyl 2-amino-3,5-difluoroisonicotinate (CAS 2803703-94-6)
- Semaglutide Impurity 75 (CAS CATO-C4X-2226175)
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