Sulfasalazine Impurity 21 CAS 2033064-44-5
| CAS No. | 2033064-44-5 |
| Molecular Formula | C24H19N5O7S2 |
| Molecular Weight | 553.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Sulfasalazine Impurity 21 is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Sulfasalazine Impurity 21 (CAS 2033064-44-5) is a certified pharmaceutical impurity reference standard with the molecular formula C24H19N5O7S2 and a molecular weight of 553.57 g/mol.
Based on its molecular formula C24H19N5O7S2, Sulfasalazine Impurity 21 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 553.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO manufactures Sulfasalazine Impurity 21 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 | C24H19N5O7S2 |
| Molecular Weight | 553.57 g/mol |
| Purity | ≥95% |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Sulfasalazine Standards
- Sulfasalazine impurity 15 (CAS CATO-C4X-141915)
- Sulfasalazine EP Impurity A (CAS 1391062-35-3)
- Sulfasalazine Impurity 19 (CAS 2033064-46-7)
- Sulfasalazine EP Impurity E (CAS 1391062-34-2)
- Sulfasalazine EP Impurity G (CAS 1391062-37-5)
- Sulfasalazine EP Impurity B (CAS 1391062-49-9)
- Sulfasalazine Impurity 17 (CAS CATO-C4X-141917)
- Sulfasalazine EP Impurity B (CAS 1391062-49-9（free base）)
Recommended Standards
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- Rebastinib (CAS 1020172-07-9)
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- Cefdinir Impurity 95 (CAS CATO-C4X-121095)
- Itraconazole Impurity 95 (CAS CATO-C4X-149795)
- Regadenoson Impurity 1 (CAS 313348-29-7)
- 1-(4-Chlorophenyl)pentan-2-one (CAS 607391-63-9)
- N-(3-Cyano-5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)-3-(methylthio)benzamide (CAS 896357-94-1)
- Bicyclo[3.2.0]hept-3-en-6-one (CAS 54074-60-1)
- 1H-PYRROLO[2,3-B]PYRIDINE, 5-CHLORO- 5-CHLORO-1H-PYRROLO[2,3-B]PYRIDINE 5-CHLORO-7-AZAINDOLE 866546-07-8 BC003914 (CAS 866546-07-8)
- 4-(cyclopropylamino)-2-((4-((S)-4-(cyclopropylsulfonyl)-2-((((R)-3-(cyclopropylsulfonyl)-1,2,3,4,4a,5-hexahydrobenzo[b]pyrazino[1,2-d][1,4]oxazin-8-yl)amino)methyl)piperazin-1-yl)-3-hydroxyphenyl)amino)pyrimidine-5-carboxamide (CAS CATO-C3D-262475)
- 7-fluoro-1H-indole-3-carbaldehyde (CAS 126921-16-2)
- Uremic Pentapeptide (CAS 71494-20-7)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com