2-((3-(3-Oxobenzo[d]isothiazol-2(3H)-yl)phenyl)sulfonamido)benzoic acid CAS 521318-69-4
| CAS No. | 521318-69-4 |
| Molecular Formula | C20H14N2O5S2 |
| Molecular Weight | 426.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 2-((3-(3-Oxobenzo[d]isothiazol-2(3H)-yl)phenyl)sulfonamido)benzoic acid (CAS 521318-69-4), a certified reference material (molecular formula C20H14N2O5S2, MW 426.47 g/mol) for analytical method development and quality control.
Structurally, 2-((3-(3-Oxobenzo[d]isothiazol-2(3H)-yl)phenyl)sulfonamido)benzoic acid (C20H14N2O5S2) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 426.47 g/mol, it falls into the moderately-high-molecular-weight range. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 2-((3-(3-Oxobenzo[d]isothiazol-2(3H)-yl)phenyl)sulfonamido)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.
Physical & Chemical Properties
| Molecular Formula | C20H14N2O5S2 |
| Molecular Weight | 426.47 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Oxobenzo Standards
- (S)-2-(4-((4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)methyl)cyclohexane-1-carboxamido)-2-phenylacetic acid (CAS 1217458-07-5)
- 2-Oxobenzo[d][1,3]oxathiol-6-yl 2-((3,4,4-trifluorobut-3-en-1-yl)thio)nicotinate (CAS 478081-05-9)
- (4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)methyl 5-bromo-2-chlorobenzoate (CAS 453516-78-4)
- 2-(2-(2-Oxobenzo[d]thiazol-3(2H)-yl)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid (CAS 755018-06-5)
- Ethyl 3-oxobenzo[d]isoxazole-2(3H)-carboxylate (CAS 73806-09-4)
- 4-(3-Oxobenzo[d][1,2]selenazol-2(3H)-yl)benzoic acid (CAS 153871-75-1)
- 3-(4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)-N-(4-(trifluoromethyl)phenyl)propanamide (CAS 880810-66-2)
- Ethyl 2-(4-(3-oxobenzo[d][1,2]selenazol-2(3H)-yl)phenyl)acetate (CAS 81743-96-6)
Recommended Standards
- (S,S)-1,2-Bis[(2-methylphenyl)-(phenyl)phosphino]ethane (CAS 810667-85-7)
- 2-((4-(1H-Pyrrol-1-yl)-5-(thiophen-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-nitrophenyl)acetamide (CAS 886921-92-2)
- (R,R)-1,2-Bis[(2-methylphenyl)-(phenyl)phosphino]ethane (CAS 81157-90-6)
- Etrumadenant (AB928) (CAS 2239273-34-6)
- Pipobroman (CAS 54-91-1)
- 5-Benzyl-2-methyl-1,3,2-dioxaborinane (CAS 672290-85-6)
- 4-Chloro-1-(3-chlorophenyl)-1-oxobutane (CAS 90793-58-1)
- N-((3-methoxybenzyl)oxy)hydrazinecarboxamide (CAS 885951-49-5)
- 5-Cyclopropoxy-3-iodopicolinamide (CAS 1243321-27-8)
- Bromperidol Decanoate (CAS 75067-66-2)
- Clotrimazole (CAS 23593-75-1)
- 4-(5,5-Dimethyl-1,3-dioxan-2-yl)-2-ethoxybutyrophenone (CAS 898755-75-4)
- 3-[(1,1-Dioxido-1,2-benzisothiazol-3-yl)amino]-2-thioxo-4-thiazolidinone (CAS 591212-77-0)
- Semaglutide impurity 91 (CAS CATO-C4X-222691)
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