21821-40-9 4-(5-formyl-2-furanyl)benzenesulfonamide 4-(5-methanoylfuran-2-yl)benzenesulfonamide A815683 CAS 21821-40-9
| CAS No. | 21821-40-9 |
| Molecular Formula | C11H19NO4S |
| Molecular Weight | 261.34 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
21821-40-9 4-(5-formyl-2-furanyl)benzenesulfonamide 4-(5-methanoylfuran-2-yl)benzenesulfonamide A815683 (CAS 21821-40-9), molecular formula C11H19NO4S and molecular weight 261.34 g/mol, is a CATO reference standard with documented purity and traceability.
21821-40-9 4-(5-formyl-2-furanyl)benzenesulfonamide 4-(5-methanoylfuran-2-yl)benzenesulfonamide A815683 (C11H19NO4S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C11H19NO4S |
| Molecular Weight | 261.34 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related formyl Standards
- 1-(4-Formyl-phenyl)-piperidine-3-carboxylic acid ethyl ester (CAS 1260784-23-3)
- 1-(2-Formyl-phenyl)-piperidine-3-carboxylic acid ethyl ester (CAS 1260842-92-9)
- 3(S)-Formyl-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester (CAS 145525-27-5)
- 3(R)-Formyl-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester (CAS 444583-19-1)
- 3-Formyl-N-phenylbenzenesulfonamide (CAS 405058-55-1)
- (3-Formyl-1H-indazol-6-yl)-carbamic acid tert-butyl ester (CAS 944904-72-7)
- 90429-09-7 4-Formyl-6-methoxy-3-nitrophenoxyacetic acid Acetic acid, (4-formyl-2-methoxy-5-nitrophenoxy)- 4-Fmnpaa (CAS 90429-09-7)
- 2-{[2-formyl-4-(trifluoromethyl)phenyl](methyl)amino}acetic acid (CAS 953062-31-2)
Recommended Standards
- Tert-butyl 2-thia-6-azaspiro[3.4]Octane-6-carboxylate 2,2-dioxide (CAS 2387123-36-4)
- Lurasidone Impurity 55 (CAS CATO-C4X-102855)
- S-Allyl-N-(tert-butoxycarbonyl)-D-cysteine (CAS 770742-95-5)
- (2-Amino-5-ethylthiophen-3-yl)(2-methoxyphenyl)methanone (CAS CATO-C4X-35093)
- 2-(Dimethoxymethyl)-5,6,7,8-tetrahydro-1,8-naphthyridine-3-carbaldehyde (CAS 1708974-56-4)
- 4-Amino-2,6-dichlorobenzene-1-sulfonamide (CAS 172514-47-5)
- Ethyl 6-oxospiro[2.5]octane-1-carboxylate (CAS 1447942-87-1)
- Benzyl N-[(3S,4R)-3-hydroxypiperidin-4-yl]carbamate (CAS 1638744-38-3)
- 1-(Phenylsulfonyl)piperidin-4-one O-methylsulfonyl oxime (CAS 477847-30-6)
- 2,6-Dibromo-4-hydroxybenzoic acid (CAS 1935194-66-3)
- R84N0RD251 41519-23-7 Hexenyl isobutanoate, (3Z)- (Z)-Hex-3-enyl isobutyrate Propanoic acid, 2-methyl-, 3-hexenyl ester, (Z)- Propanoic acid, 2-methyl-, (3Z)-3-hexen-1-yl ester Propanoic acid, 2-methyl-, (3Z)-3-hexenyl ester 3-02-00-00651 (Beilstein Handbook Reference) AI3-33348 BRN 1759547 EINECS 255-424-0 ENT 33348 beta,gamma-Hexenyl isobutanoate cis-3-Hexenyl isobutyrate (Z)-2-Methylpropanoic acid 3-hexenyl ester (Z)-3-Hexenyl isobutyrate UNII-R84N0RD251 (CAS 41519-23-7)
- tert-Butyl 2-acetyl-4-oxopentanoate (CAS 318511-70-5)
- 2,2'-(Ethane-1,2-diyldisulfonyl)diethanol (CAS 7484-34-6)
- 149471-11-4 Neuropeptide DF2 L-Phenylalaninamide, L-alpha-aspartyl-L-arginyl-L-asparaginyl-L-phenylalanyl-L-leucyl-L-arginyl- Asp-arg-asn-phe-leu-arg-phe-NH2 Aspartyl-arginyl-asparaginyl-phenylalanyl-leucyl-arginyl-phenylalaninamide L-alpha-Aspartyl-L-arginyl-L-asparaginyl-L-phenylalanyl-L-leucyl-L-arginyl-L-phenylalaninamide DF(2) Neuropeptide Drnflrfamide (CAS 149471-11-4)
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