Josamycin Impurity 11 CAS 31674-19-8
| CAS No. | 31674-19-8 |
| Molecular Formula | C45H73NO16 |
| Molecular Weight | 884.06 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Josamycin Impurity 11 (C45H73NO16) contains a nitrogen-containing heterocyclic scaffold, an amide group, 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. 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 Josamycin Impurity 11 (CAS 31674-19-8), a pharmacopoeial impurity reference standard (molecular formula C45H73NO16, MW 884.06 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 | C45H73NO16 |
| Molecular Weight | 884.06 g/mol |
| Purity | >95% |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
Related Josamycin Standards
- Josamycin Propionate - API Standards (CAS 40922-77-8)
- Josamycin Impurity 6 (CAS CATO-C4X-30156)
- Josamycin Impurity 9 (CAS 209549-21-3)
- Josamycin EP Impurity J (CAS CATO-C4X-301512)
- Josamycin EP Impurity E (Platenomycin A1) (CAS 40615-47-2)
- Josamycin Impurity 7 (CAS CATO-C4X-30157)
- Josamycin EP Impurity B (18-Dihydroleucomycin A3) (CAS 40361-41-9)
- Josamycin Impurity 10 (CAS CATO-C4X-301510)
Recommended Standards
- Alpha-Solamarine (CAS 20318-30-3)
- Solasonine (CAS 19121-58-5)
- 4-((6-Aminopyrimidin-4-yl)amino)benzenesulfonamide hydrochloride (CAS 21886-12-4)
- MAL-dPEG<SUP>®</SUP><SUB>11</SUB>-Lipoamide (CAS 1334172-73-4)
- Sodium Cromoglicate Impurity 13 (CAS 53878-47-0)
- Baloxavir Impurity 1 (CAS 1985607-70-2)
- Dopamine Impurity 87 HCI (CAS 88408-41-7；102851-70-7（free base）)
- (S)-5-((Trityloxy)methyl)pyrrolidin-2-one (CAS 105526-85-0)
- Tolvaptan Impurity 9 (CAS 1432725-23-9)
- Diacetoxyzirconium(IV) Oxide (ca. 20% in Water) (CAS 5153-24-2)
- 2-(4-Bromo-1H-pyrazol-1-yl)isonicotinonitrile (CAS 1183746-57-7)
- trans-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)cyclopropanecarboxylic acid (CAS 1612892-47-3)
- 2-(Pyrrolidin-3-yl)propan-2-ol (CAS 351369-41-0)
- Antiarrhythmic peptide (cattle atrium) (CAS 81771-37-1)
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