Calcitonin EP Impurity D CAS CATO-C4X-221810
| CAS No. | CATO-C4X-221810 |
| Molecular Formula | C147H242N44O49S2 |
| Molecular Weight | 3473.89 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 Calcitonin EP Impurity D.
Calcitonin EP Impurity D (CAS CATO-C4X-221810) is a certified pharmaceutical impurity reference standard with the molecular formula C147H242N44O49S2 and a molecular weight of 3473.89 g/mol.
Calcitonin EP Impurity D (C147H242N44O49S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C147H242N44O49S2 |
| Molecular Weight | 3473.89 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) | 49.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 44 |
| Sulfur Atoms | 2 |
Related Calcitonin Standards
- Calcitonin EP Impurity A (CAS CATO-C4X-22181)
- Calcitonin Impurity 26 (CAS CATO-C4X-221826)
- Calcitonin EP Impurity E (CAS CATO-C4X-22185)
- Calcitonin Impurity 24 (CAS CATO-C4X-221824)
- Calcitonin Impurity 21 X TFA Salt (CAS CATO-C4X-221821)
- Calcitonin Impurity 11 (CAS 187476-38-6)
- Calcitonin Impurity 12 (CAS CATO-C4X-221812)
- Calcitonin Impurity 13 (CAS CATO-C4X-221813)
Recommended Standards
- GRF (1-29) amide (rat) (CAS 91826-20-9)
- Acetyl-(D-Phe2)-GRF amide (human) (H-5565.1000) (CAS 93965-89-0)
- VIP Antagonist (CAS 125093-93-8)
- (Asn10,Leu11,D-Trp12)-pTH-Related Protein (7-34) amide (human, mouse, rat) trifluoroacetate salt (CAS 129622-68-0)
- Elagolix Impurity 112 (CAS CATO-C4X-2068112)
- N-Nitroso Ondansetron impurity 30 (CAS CATO-C4X-139430)
- Iohexol Impurity 33 (CAS CATO-C4X-166433)
- N-(3-(2-(5-Nitrofuran-2-yl)vinyl)-1,2,4-oxadiazol-5-yl)acetamide (CAS 22508-01-6)
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- 4-bromo-3-methyl-5-nitropyridine (CAS 179677-09-9)
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