Firocoxib Impurity 2 CAS 189955-79-1
| CAS No. | 189955-79-1 |
| Molecular Formula | C11H13BrO3S |
| Molecular Weight | 305.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Firocoxib Impurity 2 (CAS 189955-79-1), a certified reference material (molecular formula C11H13BrO3S, MW 305.19 g/mol) for analytical method development and quality control.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, Firocoxib Impurity 2 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 305.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), Firocoxib Impurity 2 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 | C11H13BrO3S |
| Molecular Weight | 305.19 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2011 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Firocoxib Standards
- Firocoxib Impurity 6 (CAS CATO-C4X-32116)
- Firocoxib Impurity 1 (CAS CATO-C4X-32111)
- Firocoxib (CAS 189954-96-9)
- Firocoxib Impurity 2 (CAS CATO-C4X-32112)
- Firocoxib Impurity 3 (CAS CATO-C4X-32113)
- Firocoxib Impurity 4 (CAS 246869-15-8)
- Firocoxib Impurity 1 (CAS 204390-60-3)
- Firocoxib Impurity 1 (CAS 53207-58-2)
Recommended Standards
- 1-Bromo-4-methyl-9h-thioxanthen-9-one (CAS 1859087-87-8)
- 3-Bromo-4-(thiomethyl)benzophenone (CAS 197439-23-9)
- (3aS,5R,7aS)-7a-(4-Bromothiazol-2-yl)-5-methylhexahydro-1H-pyrano[3,4-c]isoxazole (CAS 1818341-13-7)
- 1-((2-Bromophenyl)sulfonyl)piperazine (CAS 744243-41-2)
- (S)-2-((3,4-Dimethylisoxazol-5-yl)amino)pentanamide (CAS 794565-18-7)
- Benzyl ((1H-indol-2-yl)methyl)carbamodithioate (CAS 917986-01-7)
- 2,5-Dibromo-1,3-diethylbenzene (CAS 314084-64-5)
- 2-(Benzylthio)-4-hydroxypyrimidine-5-carboxylic acid (CAS 93185-33-2)
- Hydromorphone Hydrochloride CII (50 mg) (CAS 71-68-1)
- 2-((4-Bromobenzyl)thio)-1h-benzo[d]imidazole (CAS 296273-25-1)
- LY 235959 (CAS 137433-06-8)
- 8-Methyl-3-phenyl-2H-indeno[2,1-b]furan-2-one (CAS 832100-00-2)
- 1-(4-Bromophenyl)-2-(2-chlorophenyl)-1H-imidazole-4-carboxylic acid (CAS 918350-01-3)
- Semaglutide（sodium salt） (CAS CATO-C4X-222619)
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