3,4,5-Trichlorobenzoic acid CAS 51-39-8
| CAS No. | 51-39-8 |
| Molecular Formula | C7H3Cl3O2 |
| Molecular Weight | 225.46 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.
3,4,5-Trichlorobenzoic acid (CAS 51-39-8), molecular formula C7H3Cl3O2 and molecular weight 225.46 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H3Cl3O2, 3,4,5-Trichlorobenzoic acid 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 225.46 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).
As a certified reference material (CRM), 3,4,5-Trichlorobenzoic 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 | C7H3Cl3O2 |
| Molecular Weight | 225.46 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.) | 1957 |
| Halogen Content | Cl-containing |
Related Trichlorobenzoic Standards
Recommended Standards
- 2,6-Dichlorophenyl chloroformate (CAS 374568-08-8)
- 3,4,5-Trichloropicolinamide (CAS 202192-84-5)
- 2,4,6-Trichlorophenyl Formate (CAS 4525-65-9)
- 3,4-Dichlorophenyl chloroformate (CAS 72305-24-9)
- 4-Cyclopropoxy-5-isopropyl-N,N-dimethylnicotinamide (CAS 1243442-88-7)
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- D-Pro38-Tirzepatide (CAS CATO-CPTD788901)
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