Piroxicam Impurity 19 CAS CATO-C4X-173319
| CAS No. | CATO-C4X-173319 |
| Molecular Formula | C15H11NO5S |
| Molecular Weight | 317.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO supplies Piroxicam Impurity 19 (CAS CATO-C4X-173319), a pharmacopoeial impurity reference standard (molecular formula C15H11NO5S, MW 317.32 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Piroxicam Impurity 19 (C15H11NO5S) 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 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 317.32 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), Piroxicam Impurity 19 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C15H11NO5S |
| Molecular Weight | 317.32 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Piroxicam Standards
- Piroxicam EP Impurity B (CAS 65897-46-3)
- Piroxicam (CAS 36322-90-4)
- Piroxicam Impurity 27 (CAS 1184017-37-5)
- Piroxicam D3 (N-methyl D3) (CAS 942047-64-5)
- Piroxicam EP Impurity L(Meloxicam EP Impurity F) (CAS 118854-48-1)
- Piroxicam Impurity 20 (CAS CATO-C4X-173320)
- Piroxicam Impurity 16 (CAS 1797884-12-8)
- Piroxicam Impurity 25 (CAS CATO-C4X-173325)
Recommended Standards
- Faropenem Impurity 62 (CAS CATO-C4X-128962)
- tert-Butyl 2-((4-nitrophenyl)sulfonyl)hydrazine-1-carboxylate (CAS 333440-71-4)
- Landiolol Impurity 128 (CAS CATO-C4X-2621128)
- Pirimiphos-ethyl-oxon (CAS 36378-61-7)
- Moxifloxacin Hydrochloride EP Impurity B (CAS 1246911-63-6)
- Sivelestat sodium impurity 41 (CAS CATO-C4X-212341)
- (R,R)-Formoterol Impurity (CAS 67346-49-0)
- ((2R,3S,5S)-3-Fluoro-5-methoxytetrahydrofuran-2-yl)methyl [1,1'-biphenyl]-4-carboxylate (CAS 168786-98-9)
- Ethyl 2-(2-Chloro-3-methyl-4-pyridyl)acetate (CAS 1261471-41-3)
- 4-Bromo-N-(2-bromo-4-methylphenyl)benzamide (CAS 301228-27-3)
- Hydrochlorothiazide Impurity 29 (CAS 957785-35-2)
- 6-Fluoro-1H-indazole-7-carboxylic acid (CAS 1638764-09-6)
- Allyl(3-chloro-2-methylphenyl)sulfane (CAS 1378419-56-7)
- [D-His]-Semaglutide B (x TFA Salt) (CAS CATO-C4X-2226117)
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