4-(4-(1-(3-Ethylbenzo[d]thiazol-2(3H)-ylidene)propan-2-ylidene)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid CAS 31994-53-3
| CAS No. | 31994-53-3 |
| Molecular Formula | C22H21N3O4S2 |
| Molecular Weight | 455.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-(4-(1-(3-Ethylbenzo[d]thiazol-2(3H)-ylidene)propan-2-ylidene)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic 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-(4-(1-(3-Ethylbenzo[d]thiazol-2(3H)-ylidene)propan-2-ylidene)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (CAS 31994-53-3), molecular formula C22H21N3O4S2 and molecular weight 455.55 g/mol, is a CATO reference standard with documented purity and traceability.
4-(4-(1-(3-Ethylbenzo[d]thiazol-2(3H)-ylidene)propan-2-ylidene)-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid (C22H21N3O4S2) contains a flavonoid core, an amide group, a sulfone 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. 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 | C22H21N3O4S2 |
| Molecular Weight | 455.55 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related Ethylbenzo Standards
- 1-(6-Ethylbenzo[d]thiazol-2-yl)-5-(furan-2-yl)-3-hydroxy-4-(5-methylfuran-2-carbonyl)-1,5-dihydro-2H-pyrrol-2-one (CAS 618416-45-8)
- 6-(2-(3-(3-Ethylbenzo[d]oxazol-3-ium-2-yl)allylidene)benzo[d]oxazol-3(2H)-yl)hexanoate (CAS 260430-02-2)
- 2-(5-(1-(3-Ethylbenzo[d]thiazol-2(3H)-ylidene)propan-2-ylidene)-4-oxo-2-thioxothiazolidin-3-yl)acetic acid (CAS 34431-79-3)
- 2-(5-(2-(3-Ethylbenzo[d]oxazol-2(3H)-ylidene)ethylidene)-4-oxo-2-thioxothiazolidin-3-yl)acetic acid (CAS 23236-18-2)
- 1,2-Bis(3-ethylbenzo[d]thiazol-2(3H)-ylidene)hydrazine (CAS 2814-60-0)
- 5-(3-Ethylbenzo[d]oxazol-2(3H)-ylidene)-3-phenyl-2-thioxothiazolidin-4-one (CAS 25962-16-7)
- N-(4-Ethylbenzo[d]thiazol-2-yl)-2,3-dimethoxybenzamide (CAS 895444-94-7)
- N-(4-Ethylbenzo[d]thiazol-2-yl)benzo[d]thiazole-6-carboxamide (CAS 868677-89-8)
Recommended Standards
- 3-[1-[(1R)-1,2-Dihydro-1-acenaphthylenyl]-4-piperidinyl]-2,3-dihydro-2-oxo-1H-benzimidazole-1-acetic Acid Ethyl Ester (CAS 610323-29-0)
- Ethyl 4-cyano-5-{2-[(3-cyano-6-methyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)sulfanyl]acetamido}-3-methylthiophene-2-carboxylate (CAS 488793-00-6)
- 1-Cyclohexyl-2-imino-10-methyl-5-oxo-N-(1-phenylethyl)-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide (CAS 618078-34-5)
- N-(2-(5-(2-Methoxyphenyl)-1-(thiophene-2-carbonyl)-4,5-dihydro-1H-pyrazol-3-yl)phenyl)methanesulfonamide (CAS 923195-05-5)
- 3-Amino-N-(3-chloro-phenyl)-4-methyl-benzenesulfonamide (CAS 326023-04-5)
- 2-(dibutylamino)ethanol (CAS 102-81-8)
- 1-(3-Fluoro-benzyl)-3,5-dimethyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (CAS 1450642-70-2)
- 545349-40-4 3-Chloro-N-(5-nitropyridin-2-yl)propanamide MFCD03388031 (CAS 545349-40-4)
- 1-(Difluoromethyl)-5-(methoxymethyl)-1H-pyrazole (CAS 1856041-63-8)
- N-(4-Aminophenyl)propanamide hydrochloride (CAS 1171829-70-1)
- [(1S)-1-[(7-bromo-2,3-dioxo-1,4-dihydroquinoxalin-5-yl)methylamino]ethyl]phosphonic acid (CAS 206648-13-7)
- 1H-Indole-1-carbonitrile (CAS 90418-56-7)
- (1R,2R,3aS,4S,6R,7aS)-6-Chloro-1-(2-chloroacetyl)-4-(5-hydroxy-2-methylphenethyl)-2,7a-dimethyl-5-ox (CAS 205808-74-8)
- Insulin Degludec Impurity 5 (CAS CATO-C4X-21575)
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