4-(Ethanesulfonyl)benzoic acid CAS 21571-66-4
| CAS No. | 21571-66-4 |
| Molecular Formula | C9H10O4S |
| Molecular Weight | 214.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-(Ethanesulfonyl)benzoic 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.
4-(Ethanesulfonyl)benzoic acid (CAS 21571-66-4), molecular formula C9H10O4S and molecular weight 214.24 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H10O4S, 4-(Ethanesulfonyl)benzoic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 214.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C9H10O4S |
| Molecular Weight | 214.24 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Sulfur Atoms | 1 |
Related Ethanesulfonyl Standards
- 2-[(3Z)-1-(ethanesulfonyl)piperidin-3-ylidene]acetonitrile (CAS 2102414-94-6)
- 2-[1-(ethanesulfonyl)piperidin-4-ylidene]acetonitrile (CAS 2102412-13-3)
- 2-(ethanesulfonyl)-N-ethylaniline (CAS 1155562-08-5)
- 1-[4-(ethanesulfonyl)phenyl]ethan-1-amine (CAS 805951-56-8)
- 1-(Ethanesulfonyl)-2-nitrobenzene (CAS 2976-33-2)
- (2-Ethanesulfonyl-ethylsulfanyl)-acetic acid (CAS 499987-50-7)
- 1-[4-(ethanesulfonyl)phenyl]ethan-1-one (CAS 99186-50-2)
- 2-(Ethanesulfonyl)-1-phenylethan-1-one (CAS 77970-53-7)
Recommended Standards
- 4-(5-Nitrothiophen-2-yl)morpholine (CAS 19991-85-6)
- 4-(Ethoxycarbonyl)-3-methylthiophene-2-carboxylic acid (CAS 799283-87-7)
- 4-((4-Methylthiazol-2-yl)amino)-4-oxobutanoic acid (CAS 313660-65-0)
- 4-(Methylsulfonyl)benzohydrazide (CAS 53554-94-2)
- ZINC 69391 (CAS 303094-67-9)
- Amino-(2-nitro-phenyl)-acetic acid (CAS 50381-53-8)
- 3-Hydroxy-N-((6S,9S,12S,15R,16S,19R,23R,24aR)-23-hydroxy-19-isobutyl-2,5,9,11,15-pentamethyl-6-((S)-3-methylbutan-2-yl)-1,4,7,10,13,17,20-heptaoxo-12-phenyldocosahydro-1H-pyrrolo[2,1-o][1,4,7,10,13,16,19]oxahexaazacyclodocosin-16-yl)picolinamide (CAS 299-20-7)
- 2-(6-Amino-5-(difluoromethyl)pyridin-2-yl)acetic acid (CAS 1806768-95-5)
- Methyl 6-cyano-2-methylnicotinate (CAS 1108725-10-5)
- 1,3,3-Triphenylpropan-1-one (CAS 606-86-0)
- 4-Oxo-4-(pyridin-4-ylamino)butanoic acid (CAS 62134-51-4)
- N-(5-Chloro-2-methylphenyl)-3-methylbenzamide (CAS 304890-11-7)
- 2-Fluoro-3-(trifluoromethoxy)benzaldehyde (CAS 1159512-58-9)
- Des-Ile27-Tirzepatide (CAS CATO-CPTD788946)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com