Sitafloxacin Impurity 87 CAS 500295-84-1
| CAS No. | 500295-84-1 |
| Molecular Formula | C19H19F2N3O4 |
| Molecular Weight | 391.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Sitafloxacin Impurity 87 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
CATO supplies Sitafloxacin Impurity 87 (CAS 500295-84-1), a pharmacopoeial impurity reference standard (molecular formula C19H19F2N3O4, MW 391.37 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Sitafloxacin Impurity 87 (C19H19F2N3O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. 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 391.37 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C19H19F2N3O4 |
| Molecular Weight | 391.37 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | ≥95% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Sitafloxacin Standards
- Sitafloxacin Impurity 1 (CAS CATO-C4X-11551)
- Sitafloxacin Impurity 69 (CAS CATO-C4X-115569)
- Sitafloxacin Impurity 29 (CAS CATO-C4X-115529)
- Sitafloxacin Dechloro Impurity (CAS CATO-C4X-115524)
- Sitafloxacin impurity 86 (CAS CATO-C4X-115586)
- Sitafloxacin Isomer Impurity 3(SSR) (CAS 127254-11-9)
- Sitafloxacin Isomer Impurity 4(RSR) (CAS 127199-06-8)
- Sitafloxacin Isomer Impurity (RRR) (CAS CATO-C4X-11555)
Recommended Standards
- 1-((5-Cyclopentyl-1,2,4-oxadiazol-3-yl)methyl)-5-(3-(pyrazin-2-yl)-1,2,4-oxadiazol-5-yl)pyridin-2(1H)-one (CAS 1396855-78-9)
- Osimertinib Impurity N4 (CAS 1956306-73-2)
- TPA-023B, >98% (HPLC) (CAS 425377-76-0)
- (2-((1,4-Dioxa-8-azaspiro[4.5]Decan-8-yl)methyl)phenyl)(3,4,5-trifluorophenyl)methanone (CAS 898781-08-3)
- Lumateperone Impurity 4 (and enantiomer) (CAS CATO-C4X-22014)
- Timolol Impurity 28 (CAS CATO-C4X-149628)
- Bevantolol Impurity 11 (CAS 54738-08-8)
- 1-(2-Chloro-4-nitrophenyl)piperidine (CAS 55403-25-3)
- 2-((6-Chloropyridazin-3-yl)thio)ethan-1-ol (CAS 17285-06-2)
- 3-(Benzylamino)phenol (CAS 46457-64-1)
- 1-(3-Butoxy-5-fluorophenyl)ethan-1-ol (CAS 1443303-95-4)
- N-(4-Bromothiophen-2-yl)acetamide (CAS 98453-24-8)
- 1-(1,3-Dimethyl-5-phenoxy-1H-pyrazol-4-yl)ethanone (CAS 109925-36-2)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
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