5-(Ethylsulfonyl)-2-hydroxy-benzoic acid CAS 97991-90-7
| CAS No. | 97991-90-7 |
| Molecular Formula | C9H10O5S |
| Molecular Weight | 230.24 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 5-(Ethylsulfonyl)-2-hydroxy-benzoic acid.
5-(Ethylsulfonyl)-2-hydroxy-benzoic acid (CAS 97991-90-7), molecular formula C9H10O5S and molecular weight 230.24 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-(Ethylsulfonyl)-2-hydroxy-benzoic acid (C9H10O5S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, 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 230.24 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C9H10O5S |
| Molecular Weight | 230.24 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.) | 1984 |
| Sulfur Atoms | 1 |
Related Ethylsulfonyl Standards
- 2-(Ethylsulfonyl)-1-(2-fluorophenyl)ethanone (CAS 1340284-71-0)
- 2-(Ethylsulfonyl)-1-(3-fluorophenyl)ethanone (CAS 1343309-99-8)
- 3-[(ethylsulfonyl)amino]benzoic acid (CAS 117292-19-0)
- 2-(Ethylsulfonyl)-1-(4-fluorophenyl)ethanamine (CAS 1487970-59-1)
- 1-(2-(Ethylsulfonyl)ethyl)-3,5-dimethyl-1h-pyrazol-4-amine (CAS 1157828-83-5)
- 1-(3-(Ethylsulfonyl)propyl)-4-methyl-1h-pyrazol-3-amine (CAS 1491709-01-3)
- 4-(Ethylsulfonyl)-N1,N1-dimethylbenzene-1,3-diamine (CAS 1220028-78-3)
- 1-(2-(Ethylsulfonyl)cyclopropyl)-4-fluorobenzene (CAS 1707609-03-7)
Recommended Standards
- 5-(1-(Methylsulfonyl)cyclopropyl)furan-2-carboxylic acid (CAS 2773477-69-1)
- 5-Acetamido-2-aminobenzenesulfonic acid (CAS 96-78-6)
- 5-((Ethoxycarbonyl)amino)-3-methylisothiazole-4-carboxylic acid (CAS 22131-50-6)
- 5-Amino-1-(3-fluoro-5-methylphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (CAS 2197056-48-5)
- 2-(1-aminoethyl)pyrimidin-4-amine dihydrochloride (CAS 1864015-10-0)
- 1082501-00-5 8463AC C12H18N2O5S {1-[(3,5-Dimethylisoxazol-4-yl)sulfonyl]piperidin-4-yl}acetic acid (CAS 1082501-00-5)
- Zotepine Impurity9 (CAS 133884-20-5)
- （Z)-Pyriminobac-methyl (CAS 147411-70-9)
- Oxacillin Impurity 52 (CAS CATO-C4X-232152)
- Thiazolo[4,5-b]pyridin-2-amine (CAS 13575-41-2)
- 2-(5-methyl-1H-1,2,4-triazol-3-yl)piperidine dihydrochloride (CAS 1803560-93-1)
- 1-[benzyl(methyl)carbamoyl]piperidine-4-carboxylic acid (CAS 1018283-27-6)
- 2,7,12-Trinitro-5H-diindeno[1,2-a:1',2'-c]fluorene-5,10,15-trione (CAS 209112-54-9)
- Tirzepatide Impurity 59 (CAS CATO-C4X-324059)
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