2-Chloro-5-sulfobenzoic acid CAS 40284-70-6
| CAS No. | 40284-70-6 |
| Molecular Formula | C7H5ClO5S |
| Molecular Weight | 236.63 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-Chloro-5-sulfobenzoic acid.
2-Chloro-5-sulfobenzoic acid (CAS 40284-70-6) is a high-purity analytical reference standard with the molecular formula C7H5ClO5S and a molecular weight of 236.63 g/mol.
Based on its molecular formula C7H5ClO5S, 2-Chloro-5-sulfobenzoic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 236.63 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures 2-Chloro-5-sulfobenzoic 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 | C7H5ClO5S |
| Molecular Weight | 236.63 g/mol |
| 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, water |
| 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.) | 1968 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 4-Chloro-6-fluoro-7-methoxyquinoline-3-carbonitrile (CAS 1017788-78-1)
- 4-Chloro-6-fluoro-8-methoxyquinoline-3-carbonitrile (CAS 1247810-29-2)
- 4-Chloro-2-nitrobenzene-1-sulfonamide (CAS 13852-81-8)
- 3-(2-Chloro-6-fluorophenyl)-5-methylisoxazole-4-carbonitrile 3-(2-chloro-6-fluorophenyl)-5-methyl-4-isoxazolecarbonitrile 175204-41-8 (CAS 175204-41-8)
- 4-Chloro-8-fluoro-6-methoxyquinoline-3-carbonitrile (CAS 1823500-08-8)
- 2-Chloro-4-nitrobenzenesulfonamide (CAS 31150-99-9)
- 2-Chloro-5-nitrobenzenesulfonamide (CAS 96-72-0)
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Recommended Standards
- 3-(Chlorosulfonyl)-4-hydroxybenzoic acid (CAS 77719-02-9)
- 3-Chloro-4-nitrobenzenesulfonamide (CAS 93745-74-5)
- 5-Amino-1-(5-chloro-2-fluorophenyl)-1H-pyrazole-4-carbonitrile (CAS 1823276-36-3)
- 4-(Chlorosulfonyl)-2-hydroxybenzoic acid (CAS 98273-15-5)
- 2-Oxo-2-(2,3,4-trimethoxyphenyl)acetic acid (CAS 103988-63-2)
- 4-(3-Amino-4-methylphenyl)phthalazin-1-ol (CAS 843638-25-5)
- 3-(1-Ethyl-1h-1,2,4-triazol-5-yl)propanenitrile (CAS 1481809-85-1)
- 3-Chloro-N-[2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl]-N,4-dimethylbenzene-1-sulfonamide (CAS 1325304-09-3)
- 1-(3-Bromophenyl)-2-fluoroethan-1-one (CAS 1219632-64-0)
- 6-(Benzyloxy)picolinimidamide hydrochloride (CAS 192566-02-2)
- 2-[4-(2,5-dimethylthiophen-3-yl)-2-methyl-1,3-thiazol-5-yl]acetic acid (CAS 929974-19-6)
- N-(Piperidin-3-yl)-2,3-dihydrobenzo[b][1,4]dioxine-5-carboxamide hydrochloride (CAS 1353944-80-5)
- 1-(Furan-2-ylmethyl)-1,3-dihydro-2H-imidazole-2-thione (CAS 113825-02-8)
- [Glu]17-Semaglutide (CAS CATO-CPTD788604)
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