4,5-Dichloro-2-methoxybenzoic acid CAS 201150-65-4
| CAS No. | 201150-65-4 |
| Molecular Formula | C8H6Cl2O3 |
| Molecular Weight | 221.04 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.
4,5-Dichloro-2-methoxybenzoic acid (CAS 201150-65-4) is a high-purity analytical reference standard with the molecular formula C8H6Cl2O3 and a molecular weight of 221.04 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 4,5-Dichloro-2-methoxybenzoic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 221.04 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 4,5-Dichloro-2-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 | >95% |
| 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.) | 2014 |
| 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)
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Recommended Standards
- 3,5-Dichloro-4-hydroxybenzohydrazide (CAS 23964-29-6)
- 4,6-Dichloro-5-(1,3-dioxolan-2-yl)pyrimidine (CAS 5305-44-2)
- 3,5-dichloro-4-hydrazinylbenzoic acid (CAS 887577-44-8)
- Methyl 4-amino-3,6-dichloropicolinate (CAS 350601-39-7)
- 2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl butylcarbamate (CAS 62204-90-4)
- 1,2-Difluoro-4-iodo-3-methylbenzene (CAS 1208078-20-9)
- (5-Fluorothiophen-3-yl)methanamine (CAS 1534702-99-2)
- Benzyl chloroformate-carbonyl-<SUP>13</SUP>C (CAS 1173019-35-6)
- 3,3'-Oxybis(3-cyclohexyl-1,1,5,5-tetramethyl-1,5-divinyltrisiloxane) (CAS 302912-37-4)
- 3-(4-Bromo-2-fluorophenyl)isoxazole-5-carboxylic acid (CAS 1099629-55-6)
- (1-(Pyrimidin-4-yl)azetidin-3-yl)methanol (CAS 1484880-44-5)
- 5-Cyanothiophene-2-sulfonamide (CAS 519055-65-3)
- 1-Methylpyrrol-2-ol (CAS 89686-40-8)
- Des-[Ser]8-Liraglutide (CAS CATO-C4X-199233)
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