3-Chlorophthalic acid CAS 27563-65-1
| CAS No. | 27563-65-1 |
| Molecular Formula | C8H5ClO4 |
| Molecular Weight | 200.58 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-Chlorophthalic acid (CAS 27563-65-1), molecular formula C8H5ClO4 and molecular weight 200.58 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Chlorophthalic acid (C8H5ClO4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
CATO manufactures 3-Chlorophthalic 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 | C8H5ClO4 |
| Molecular Weight | 200.58 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl-containing |
Related Chlorophthalic Standards
Recommended Standards
- 3-Chloro-5-nitrobenzamide (CAS 50826-02-3)
- 4-Chloro-2-nitrobenzamide (CAS 41994-91-6)
- 3-chloro-2-nitrobenzamide (CAS 59772-47-3)
- 4-Chloroisophthalic Acid (CAS 2845-85-4)
- 2,5-dimethoxbenzoylacetonitrile 3-(2,5-dimethoxyphenyl)-3-oxopropanenitrile 898787-03-6 A10753 (CAS 898787-03-6)
- 3-(3,4-Dimethoxyphenyl)butanoic acid (CAS 27877-65-2)
- N-Acetylpyrazine-2-carboxamide (CAS 135742-53-9)
- Finasteride Impurity 52 (CAS CATO-C4X-164552)
- Daptomycin Impurity 37 (CAS CATO-C4X-137837)
- 3,5-Dimethoxybenzene-1,2-diamine (CAS 1075748-44-5)
- 3-(2-Chlorobenzyl)-8-methyl-3,5-dihydro-4H-pyrimido[5,4-b]indol-4-one (CAS 891015-30-8)
- 2-(3-Chloro-6-methoxyquinolin-4-yl)acetaldehyde (CAS 841303-01-3)
- 5-(3-Bromophenyl)-1,2,4-oxadiazole (CAS 1306606-33-6)
- Tirzepatide Impurity 34 (CAS CATO-C4X-324034)
Why CATO?
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