Flurbiprofen Impurity 35 CAS CATO-C4X-144435
| CAS No. | CATO-C4X-144435 |
| Molecular Formula | C19H20O5 |
| Molecular Weight | 328.36 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Flurbiprofen Impurity 35.
Flurbiprofen Impurity 35 (CAS CATO-C4X-144435) is a certified pharmaceutical impurity reference standard with the molecular formula C19H20O5 and a molecular weight of 328.36 g/mol.
Flurbiprofen Impurity 35 (C19H20O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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.
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 | C19H20O5 |
| Molecular Weight | 328.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Flurbiprofen Standards
- Flurbiprofen Impurity 38 (CAS 26039-74-7)
- Flurbiprofen impurity 103 (CAS CATO-C4X-1444103)
- Flurbiprofen Impurity 104 (CAS CATO-C4X-1444104)
- Flurbiprofen Impurity 109 (CAS 119623-42-6)
- Flurbiprofen Impurity 25 (CAS 91503-88-7)
- (R)-Flurbiprofen Axetil (Mixture of Diastereomers) (CAS 2375240-97-2)
- (S)-Flurbiprofen Axetil (Mixture of Diastereomers) (CAS 1401087-64-6)
- Flurbiprofen Axetil (CAS 91503-79-6)
Recommended Standards
- 6-((6-hydroxynaphthalen-2-yl)oxy)-2-naphthimidamide (CAS CATO-C4X-133289)
- Ketoprofen Impurity 30 (CAS CATO-C4X-147130)
- Erlotinib Impurity 60 (CAS CATO-C4X-106960)
- Lisinopril impurity 29 (CAS 1496563-44-0)
- Xanomeline Impurity 10 (CAS CATO-C4X-330110)
- Lysine Impurity 40 (CAS CATO-C4X-221140)
- Eribulin Impurity 8 (CAS 1190091-21-4)
- 5-Chloro-6-nitro-1,3-benzodioxole (CAS 7748-57-4)
- Econazole Impurity 8 (CAS 14866-28-5)
- (R)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-2-(4-hydroxycyclohexyl)acetic acid (CAS 2349460-93-9)
- N-(6-Amino-1-(4-methoxyphenyl)-3-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-3,5-dibutyl-4-hydroxybenzamide (CAS 176370-47-1)
- Ethyl 1-(2-chlorophenyl)-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate (CAS 1020237-74-4)
- 8-Chloro-7-fluoro-3,4-dihydro-2H-benzo[b][1,4]thiazine (CAS 101337-96-6)
- Allo-Thr5-Tirzepatide (CAS CATO-CPTD788934)
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