Caspofungin EP Impurity A Acetate CAS 1202167-57-4(Free Base)
| CAS No. | 1202167-57-4(Free Base) |
| Molecular Formula | C51H86N10O15 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Caspofungin EP Impurity A Acetate is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Caspofungin EP Impurity A Acetate (CAS 1202167-57-4(Free Base)) is a certified pharmaceutical impurity reference standard with the molecular formula C51H86N10O15C2H4O2 and a molecular weight of 1139.36 g/mol.
Caspofungin EP Impurity A Acetate (C51H86N10O15C2H4O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C51H86N10O15 C2H4O2 |
| Molecular Weight | 1139.36 g/mol |
| Purity | >90% |
| Storage | Store in a cool place (≤25°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 |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 10 |
Related Caspofungin Standards
- Caspofungin Impurity 24 (CAS 1131958-73-0)
- Caspofungin Impurity Triflate Salt (CAS 1201042-11-6)
- Caspofungin EP Impurity A (CAS 1202167-57-4)
- Caspofungin Pneumocandin B0 Impurity (CAS 135575-42-7)
- Caspofungin Impurity A02-2 (CAS 1404083-47-1)
- Caspofungin Impurity A02-2 Acetate (CAS 1404083-47-1(Free Base))
- Caspofungin Pneumocandin C0 (CAS 144074-96-4)
- Caspofungin Impurity 31(5-((3R)-3-Hydroxy-L-Ornithine)-Pneumocandin B0) (CAS 150283-04-8)
Recommended Standards
- Resmetirom Impurity 6 (CAS 920509-28-0)
- Efavirenz Related Compound A (CAS 209414-27-7)
- Cabotegravir Impurity 6 (CAS CATO-C4X-28766)
- (5R)-5-(aminomethyl)pyrrolidin-2-one hydrochloride (CAS 1956434-90-4)
- 4-(4-(Dimethylamino)styryl)-1-ethylpyridin-1-ium iodide (CAS 29519-52-6)
- 4-Mercaptoquinoline-8-sulfonic acid (CAS 71330-94-4)
- (E)-1-Acetyl-N-(acetyloxy)-α-(5-fluoro-2-hydroxyphenyl)-4-piperidinemethanimine (CAS 84163-52-0)
- 3-Ethyl-4-(tetrahydro-2H-pyran-4-yl)pyridine (CAS 865074-33-5)
- 5-Methylindolo[1,2-b][2,7]naphthyridin-12(6H)-one (CAS 89651-80-9)
- Liraglutide(3-31)TFA Salt (CAS CATO-C4X-19921)
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