Piroxicam O-Isopropyl Impurity CAS 118854-49-2
| CAS No. | 118854-49-2 |
| Molecular Formula | C18H19N3O4S |
| Molecular Weight | 373.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Piroxicam O-Isopropyl Impurity is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 373.43 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Piroxicam O-Isopropyl Impurity (CAS 118854-49-2), a certified reference material (molecular formula C18H19N3O4S, MW 373.43 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Piroxicam O-Isopropyl Impurity 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 | C18H19N3O4S |
| Molecular Weight | 373.43 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Piroxicam Standards
- Piroxicam Impurity 18 (CAS CATO-C4X-173318)
- Piroxicam Impurity 17 (CAS CATO-C4X-173317)
- Piroxicam Impurity 16 (CAS 1797884-12-8)
- Piroxicam Impurity 25 (CAS CATO-C4X-173325)
- Piroxicam D3 (N-methyl D3) (CAS 942047-64-5)
- Piroxicam (CAS 36322-90-4)
- Piroxicam Impurity 19 (CAS CATO-C4X-173319)
- Piroxicam EP Impurity B (CAS 65897-46-3)
Recommended Standards
- 4-(3,5-Dimethyl-1H-pyrazole-1-carbonyl)-N-(4-ethylphenyl)-1H-pyrazole-5-sulfonamide (CAS 1106778-22-6)
- Omeprazole acid methyl ester sulfide (CAS 120003-82-9)
- N-(3-(3-(Furan-2-yl)-6-oxopyridazin-1(6H)-yl)propyl)-1-phenylmethanesulfonamide (CAS 1021253-76-8)
- 4-Acetyloxy Omeprazole (CAS 1246814-65-2)
- 4-Methyl-1,5-naphthyridin-2-amine (CAS 1820640-43-4)
- 5-[(prop-2-en-1-yl)amino]-1,3,4-thiadiazole-2-thiol (CAS 91780-33-5)
- 3,3-dimethyl-8-oxa-2,4,5-triazatricyclo[7.4.0.0^{2,6}]trideca-1(9),5,10,12-tetraene hydrochloride (CAS 1208675-89-1)
- (4-amino-2,2,3-trimethylcyclohexyl)methanol (CAS 1053170-08-3)
- 1-(4-(3-Fluoropropoxy)phenyl)ethan-1-one (CAS 400878-19-5)
- 88154-77-2 (5R)-2-(Benzenesulfinyl)-5-methylcyclohexan-1-one DTXSID30455862 (CAS 88154-77-2)
- (2E)-1-(2,4-Dimethoxyphenyl)-3-(furan-2-yl)prop-2-en-1-one (CAS 4332-90-5)
- Senda chrome al (CAS 69989-75-9)
- 2-(4-Iodo-3,5-dimethyl-1H-pyrazol-1-yl)propanoic acid (CAS 1354705-06-8)
- Tirzepatide Impurity 48 (CAS CATO-C4X-324048)
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