Ensifentrine impurity 32 CAS CATO-C4X-335332
| CAS No. | CATO-C4X-335332 |
| Molecular Formula | C26H31N5O4 |
| Molecular Weight | 477.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Ensifentrine impurity 32 (C26H31N5O4) contains a steroid core, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Ensifentrine impurity 32 (CAS CATO-C4X-335332) is a certified pharmaceutical impurity reference standard with the molecular formula C26H31N5O4 and a molecular weight of 477.56 g/mol.
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), Ensifentrine impurity 32 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 | C26H31N5O4 |
| Molecular Weight | 477.56 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Ensifentrine Standards
- Ensifentrine (CAS 1884461-72-6)
- Ensifentrine impurity 34 (CAS CATO-C4X-335334)
- Ensifentrine impurity 38 (CAS CATO-C4X-335338)
- Ensifentrine impurity 11 (CAS CATO-C4X-335311)
- Ensifentrine impurity 35 (CAS CATO-C4X-335335)
- Ensifentrine impurity 31 (CAS CATO-C4X-335331)
- Ensifentrine Impurity 3 (CAS 3067475-18-4)
- Ensifentrine Impurity 4 (CAS 3067475-19-5)
Recommended Standards
- Nintedanib impurity 182 (CAS CATO-C4X-1814182)
- Palbociclib Impurity 154 (CAS CATO-C4X-1125154)
- RPL 554 (CAS 298680-25-8)
- H-Phe-Arg-Arg-OH (CAS 150398-22-4)
- Sumatriptan Impurity 6 HCl (CAS 4357-96-4)
- Prednisolone Impurity N6 (CAS 75448-51-0)
- Avibactam Impurity 147（2R,5R）Sulfate (CAS CATO-C4X-1348147)
- 2-Bromo-N-(3-ethoxyphenyl)acetamide (CAS 34325-69-4)
- 1-methyl-4-(piperidin-4-ylmethyl)piperazine (CAS 735262-46-1)
- S-(((2S,3S,4R,5S)-5-(7-Amino-1H-pyrazolo[4,3-d]pyrimidin-3-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl)-L-homocysteine (CAS 75899-14-8)
- 4-(Cyclohexylmethyl)piperidine hydrochloride (CAS 188844-14-6)
- 3-(2-Chloro-5-hydroxyphenyl)-2-methylbenzoic acid (CAS 1261946-22-8)
- Benzyl (1-(2-chloroacetyl)pyrrolidin-3-yl)(ethyl)carbamate (CAS 1353943-99-3)
- Des-Ile17-Tirzepatide (CAS CATO-CPTD788956)
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