1,3,5-Trichloro-2-methylbenzene CAS 23749-65-7
| CAS No. | 23749-65-7 |
| Molecular Formula | C7H5Cl3 |
| Molecular Weight | 195.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1,3,5-Trichloro-2-methylbenzene (CAS 23749-65-7) is a high-purity analytical reference standard with the molecular formula C7H5Cl3 and a molecular weight of 195.47 g/mol.
Structurally, 1,3,5-Trichloro-2-methylbenzene (C7H5Cl3) contains chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 195.47 g/mol, it falls into the medium-molecular-weight range. 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).
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), 1,3,5-Trichloro-2-methylbenzene 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 | C7H5Cl3 |
| Molecular Weight | 195.47 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
Related Trichloro Standards
- 1,2,3-Trichloro-4-methylbenzene (CAS 7359-72-0)
- 1,2,3-Trichloro-5-methylbenzene (CAS 21472-86-6)
- 3,4,5-Trichloro-2-methyl-pyridine (CAS 1187932-77-9)
- 2,3,5-Trichloro-4-methylpyridine (CAS 53939-29-0)
- 2,3,6-Trichloro-5-methylpyridine (CAS 58584-95-5)
- 2,4,6-Trichloro-3-methylpyridine (CAS 89487-72-9)
- 4,5,6-Trichloro-2-methylpyrimidine (CAS 1780-28-5)
- 2,4,6-Trichloro-5-methylpyrimidine (CAS 1780-36-5)
Recommended Standards
- 2,3,6-Trichlorotoluene (CAS 2077-46-5)
- 2,4,5-Trichlorotoluene (CAS 6639-30-1)
- Alpha,Alpha,Alpha-Trichlorotoluene (CAS 98-07-7)
- 2,3,5-Trichlorotoluene (CAS 56961-86-5)
- 4-Cyclopentyloxy-2-fluoro-benzonitrile (CAS 1395035-36-5)
- Propyl Propylthiosulfonate (CAS 1113-13-9)
- (1S,2R)-2-(3,5-difluorophenyl)cyclopentan-1-ol (CAS 1263869-50-6)
- N-(4-Fluorophenyl)-3-piperidinecarboxamidehydrochloride (CAS 1219976-72-3)
- N-Hydroxy-3-phenylpropanamide (CAS 17698-11-2)
- 1-(4-((Cyclopropylmethyl)amino)piperidin-1-yl)ethan-1-one (CAS 1154999-32-2)
- 6-Methyl-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-4-one (CAS 57625-61-3)
- 2-Cyclopropoxy-N-methyl-5-nitrobenzamide (CAS 1243449-10-6)
- Ethyl 5-acetyl-4-methyl-2-(2-(p-tolyloxy)acetamido)thiophene-3-carboxylate (CAS 446833-36-9)
- Insulin Degludec Impurity 3 (CAS CATO-C4X-21573)
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