2,6-Dichloro-4-methoxybenzoic acid CAS 94278-69-0
| CAS No. | 94278-69-0 |
| Molecular Formula | C8H6Cl2O3 |
| Molecular Weight | 221.04 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 2,6-Dichloro-4-methoxybenzoic acid.
2,6-Dichloro-4-methoxybenzoic acid (CAS 94278-69-0), molecular formula C8H6Cl2O3 and molecular weight 221.04 g/mol, is a CATO reference standard with documented purity and traceability.
2,6-Dichloro-4-methoxybenzoic acid (C8H6Cl2O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, 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 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), 2,6-Dichloro-4-methoxybenzoic 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 | C8H6Cl2O3 |
| Molecular Weight | 221.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; 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.) | 1983 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
- 4,5-Dichloro-N-methyl-2-nitroaniline (CAS 107342-18-7)
- 2,4-Dichloro-3-methoxybenzoic acid (CAS 115382-33-7)
- Methyl 2,4-dichloro-3-hydroxybenzoate (CAS 129788-30-3)
- 4,5-Dichloro-2-(2-oxopropyl)pyridazin-3(2H)-one (CAS 130159-58-9)
- Methyl 2,6-dichloro-3-hydroxybenzoate (CAS 142601-42-1)
- 3,4-Dichloro-2-methoxybenzoic acid (CAS 155382-86-8)
- (3,4-Dichloro-2-nitrophenyl)methanamine (CAS 1804897-45-7)
- Methyl 2,4-dichloro-5-hydroxybenzoate (CAS 1806282-22-3)
Recommended Standards
- 2,6-Dichloro-3-methoxybenzoic Acid (CAS 32890-93-0)
- 2,6-Dichloro-4-pyrimidinepropanoic Acid (CAS 212650-39-0)
- 2,5-Dichloro-4-methoxybenzoic acid (CAS 2500-03-0)
- 2-Cyclohexylidene-butyronitrile (CAS 53153-77-8)
- 4-[2-[[(1,1-Dimethylethoxy)carbonyl]methylamino]ethoxy]benzenepropanoic Acid Methyl Ester (CAS 850723-98-7)
- (2E)-1-(2,5-Dimethoxyphenyl)-3-(5-methylthiophen-2-yl)prop-2-en-1-one (CAS 941717-90-4)
- 2-((Tetrahydro-2H-pyran-4-yl)amino)ethanol (CAS 786684-00-2)
- 2,2'-(Piperidine-2,6-diyl)bis(1-phenylethan-1-one) (CAS 864969-17-5)
- 6-Bromo-2-methylnicotinic Acid (CAS 1060805-97-1)
- Carbaryl Impurity 8 (CAS 5266-96-6)
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