3-Chloro-4,5-dimethoxybenzoic acid CAS 20624-87-7
| CAS No. | 20624-87-7 |
| Molecular Formula | C9H9ClO4 |
| Molecular Weight | 216.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 216.62 g/mol gives 3-Chloro-4,5-dimethoxybenzoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 3-Chloro-4,5-dimethoxybenzoic acid (CAS 20624-87-7), a certified reference material (molecular formula C9H9ClO4, MW 216.62 g/mol) for analytical method development and quality control.
Structurally, 3-Chloro-4,5-dimethoxybenzoic acid (C9H9ClO4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 216.62 g/mol, it falls into the medium-molecular-weight range. 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.
CATO manufactures 3-Chloro-4,5-dimethoxybenzoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H9ClO4 |
| Molecular Weight | 216.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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.) | 1962 |
| Halogen Content | Cl-containing |
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- Ethyl 3-chloro-2-oxopyrazine-1(2H)-carboxylate (CAS 1194374-11-2)
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- 3-(3-Chloro-4-hydroxyphenyl)-3-hydroxypropanoic acid (CAS 1248246-33-4)
- 2-(5-Chloro-2-nitrophenoxy)ethan-1-amine (CAS 1248814-38-1)
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Recommended Standards
- 3-Chloro-2,6-dimethoxybenzoic acid (CAS 36335-47-4)
- 3-Chloro-5-ethoxy-4-hydroxybenzoic acid (CAS 733030-51-8)
- 3-chloro-2,4-dimethoxybenzoic acid (CAS 914933-75-8)
- 3-CHloro-5-nitro-2-(propan-2-yloxy)pyridine (CAS 71669-71-1)
- 2,5-Dibromo-3,4-dibutylthiophene (CAS 247088-06-8)
- 5-Fluoro-2-methoxyphenylacetic Acid (CAS 383134-85-8)
- 2-(Azetidin-3-ylsulfanyl)-1,3-benzothiazole hydrochloride (CAS 931414-67-4)
- 5-Cyano-6-fluoropicolinic acid (CAS 1805459-28-2)
- N-[6-(1-hydroxy-1-methyl-ethyl)-2-(2-methylsulfonylethyl)indazol-5-yl]-6-(trifluoromethyl)pyridine-2-carboxamide (CAS 1931994-81-8)
- 3-(3-Chloro-4-fluorophenyl)-2,6-dichloropropiophenone (CAS 898781-43-6)
- 3-Hydroxy-2-mercapto-6-(trifluoromethyl)pyridine (CAS 1934714-64-3)
- 2-(6-Cyano-4-hydroxypyridin-2-yl)acetic acid (CAS 1393539-64-4)
- rac-(1R,2S)-2-bromo-1-(bromomethyl)-1-methylcyclopropane (CAS 1969288-64-9)
- Des-Gly34-Tirzepatide (CAS CATO-CPTD788940)
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