Imrecoxib Impurity 75 CAS CATO-C4X-237975
| CAS No. | CATO-C4X-237975 |
| Molecular Formula | C18H16O4S |
| Molecular Weight | 328.38 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 Imrecoxib Impurity 75 (CAS CATO-C4X-237975), a pharmacopoeial impurity reference standard (molecular formula C18H16O4S, MW 328.38 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage, Imrecoxib Impurity 75 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 328.38 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C18H16O4S |
| Molecular Weight | 328.38 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 |
| Sulfur Atoms | 1 |
Related Imrecoxib Standards
- Imrecoxib Impurity 14 (CAS 959003-56-6)
- Imrecoxib Impurity 6 (CAS CATO-C4X-23796)
- Imrecoxib Impurity 38 (CAS 2268704-43-2)
- Imrecoxib Impurity 70 (CAS CATO-C4X-237970)
- Imrecoxib Impurity 18 (CAS CATO-C4X-237918)
- Imrecoxib Impurity 27 (CAS CATO-C4X-237927)
- Imrecoxib Impurity 13 (CAS 1338083-52-5)
- Imrecoxib Impurity 5 (CAS CATO-C4X-23795)
Recommended Standards
- 1-(1,3-Dimethyl-1H-pyrazol-4-yl)-2-mercapto-4-(4-methoxybenzylidene)-1H-imidazol-5(4H)-one (CAS 1005566-73-3)
- 2-((3-Ethyl-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7-yl)thio)-N-(p-tolyl)acetamide (CAS 1058238-74-6)
- Efinaconazole impurity 45 (CAS CATO-C4X-124345)
- 2-((3-Methyl-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7-yl)thio)-N-(4-methylbenzyl)acetamide (CAS 1058495-72-9)
- Amlodipine Impurity 133 (CAS CATO-C4X-1095133)
- Trimebutine Impurity 19 (CAS CATO-C4X-185819)
- Fluoxetine Impurity 19 (CAS 1026723-45-4)
- 5-Ethynyl-2-nitrobenzoic acid (CAS 1260828-32-7)
- Fmoc-5-oxo-5-(piperidin-1-yl)-L-Norvaline (CAS 2559759-55-4)
- N,N-dibenzyl-5-iodopyridin-2-amine (CAS 1408279-52-6)
- 3-(tert-Butyl)-4-iodophenol (CAS 1017608-22-8)
- (Z)-4-chloro-N-(1-(N'-hydroxycarbamimidoyl)cyclopentyl)benzamide (CAS 912771-46-1)
- 2-(Azetidin-3-yloxy)-N-(tert-butyl)propanamide (CAS 1342770-81-3)
- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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