Lefamulinum Impurity 4 CAS CATO-C4X-30474
| CAS No. | CATO-C4X-30474 |
| Molecular Formula | C28H45NO6S |
| Molecular Weight | 523.73 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Lefamulinum Impurity 4 (C28H45NO6S) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 523.73 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Lefamulinum Impurity 4 (CAS CATO-C4X-30474), a pharmacopoeial impurity reference standard (molecular formula C28H45NO6S, MW 523.73 g/mol) used for the identification and quantification of trace impurities in APIs.
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 | C28H45NO6S |
| Molecular Weight | 523.73 g/mol |
| Purity | 90% |
| Storage | Store at room temperature, 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Lefamulinum Standards
- Lefamulinum Impurity 17 (CAS CATO-C4X-304717)
- Lefamulinum Impurity 18 (CAS CATO-C4X-304718)
- Lefamulinum Impurity (CAS CATO-C4X-304728)
- Lefamulinum Impurity 29 (CAS CATO-C4X-304729)
- Lefamulinum Impurity 3 (CAS CATO-C4X-30473)
- Lefamulinum Impurity 15 (CAS CATO-C4X-304715)
- Lefamulinum Impurity 20 (CAS CATO-C4X-304720)
- Lefamulinum Impurity 30 (CAS CATO-C4X-304730)
Recommended Standards
- 1-O-Octadecyl-2-O-methyl-rac-glycero-3-phosphocholine (CAS 70641-51-9)
- 1-O-Octadecyl-2-O-methyl-sn-glycero-3-phosphocholine (CAS 77286-66-9)
- L28-1 (CAS CATO-C4X-35407)
- Maprotiline Hydrochloride EP Impurity B (CAS 1648814-39-4)
- Semaglutide impurity 274 (CAS CATO-C4X-2226274)
- CAS 2554975-45-8 (CAS 2554975-45-8)
- Ibutilide Impurity 5 (CAS CATO-C4X-21105)
- (S)-2-(4-fluoro-2-nitrophenyl)pyrrolidine (CAS 1213201-84-3)
- N-(2-Bromobenzyloxycarbonyloxy)succinimide (CAS 128611-93-8)
- Xenon-130 (CAS 14808-51-6)
- 4-Bromo-2-(cyclopropylmethoxy)pyridine (CAS 1610521-10-2)
- (S)-4-Nitro-N-((5-oxopyrrolidin-2-yl)methyl)benzenesulfonamide (CAS 918134-15-3)
- (R)-7-(((2S,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-(((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)tetrahydro-2H-pyran-2-yl)oxy)-5-hydroxy-2-(4-hydroxyphenyl)chroman-4-one (CAS 58001-41-5)
- Osteoblast Activating Peptide (mouse, rat) (H-7262.0500) (CAS 1222950-80-2)
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