Etelcalcetide impurity 37 CAS 1262781-48-5
| CAS No. | 1262781-48-5 |
| Molecular Formula | C36H71N21O9S2 |
| Molecular Weight | 1006.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Etelcalcetide impurity 37 (CAS 1262781-48-5, C36H71N21O9S2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Etelcalcetide impurity 37 (C36H71N21O9S2) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
As a certified reference material (CRM), Etelcalcetide impurity 37 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C36H71N21O9S2 |
| Molecular Weight | 1006.21 g/mol |
| Purity | 97%+ |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 21 |
| Sulfur Atoms | 2 |
Related Etelcalcetide Standards
- Etelcalcetide Impurity 39 (CAS CATO-C4X-324739)
- Etelcalcetide Impurity 40 (CAS CATO-C4X-324740)
- Etelcalcetide Impurity 42 (CAS CATO-C4X-324742)
- Etelcalcetide Impurity 43 (CAS CATO-C4X-324743)
- Etelcalcetide Impurity 27 X TFA Salt (CAS CATO-C4X-324727)
- Etelcalcetide impurity 33 (CAS 1262781-27-0)
- Etelcalcetide impurity 34 (CAS 1262781-26-9)
- Etelcalcetide impurity 36 (CAS 1262781-31-6)
Recommended Standards
- Bis-sulfone-PEG4-DBCO (CAS 1854034-70-0)
- Carbetocin Impurity 41 (CAS CATO-C4X-191141)
- Carbetocin Impurity 40 (CAS CATO-C4X-191140)
- Carbetocin Impurity 39 (CAS CATO-C4X-191139)
- Suzetrigine Impurity 18 (CAS CATO-C4X-336918)
- Paroxetine Hydrochloride Hemihydrate EP Impurity C (CAS 1346597-97-4)
- Ampicillin EP Impurity C(Isomeric mixture1) (CAS CATO-C4X-14433)
- 5-Iodo-2-(trifluoromethylthio)pyridine (CAS 1204234-47-8)
- Tert-butyl (S)-(2-(hydroxymethyl)-3-methylbutyl)carbamate (CAS 941292-85-9)
- 7-bromo-5-fluoro-3H-1,3-benzoxazol-2-one (CAS 32272-96-1)
- (3S,4S)-3-(Boc-amino)-4-hydroxypyrrolidine (CAS 870632-91-0)
- 6-((4-Methoxyphenyl)amino)-8-(phenylsulfonyl)-2,3-dihydroindolizin-5(1H)-one (CAS 612065-25-5)
- (R)-1-(4-bromopyridin-2-yl)-2,2,2-trifluoroethan-1-amine hydrochloride (CAS 2089671-35-0)
- Semaglutide impurity 289 (CAS CATO-C4X-2226289)
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