Prednisolone Impurity 16 CAS CATO-C4X-173716
| CAS No. | CATO-C4X-173716 |
| Molecular Formula | C21H27O7P |
| Molecular Weight | 422.41 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 422.41 g/mol gives Prednisolone Impurity 16 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Prednisolone Impurity 16 (CAS CATO-C4X-173716, C21H27O7P) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Prednisolone Impurity 16 (C21H27O7P) contains a flavonoid core, a phosphate ester group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.5, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 422.41 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C21H27O7P |
| Molecular Weight | 422.41 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 8.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Prednisolone Standards
- Prednisolone Sodium Phosphate USP Impurity I (CAS CATO-C4X-173738)
- Prednisolone Impurity 69 (CAS 31311-61-2)
- Prednisolone Impurity 27 (CAS 76282-98-9)
- Prednisolone Impurity 49 (CAS CATO-C4X-173749)
- Prednisolone Impurity 61 (CAS 50718-16-6)
- Prednisolone Impurity 29 (CAS 106822-21-3)
- Prednisolone Impurity 40 (CAS CATO-C4X-173740)
- Prednisolone impurity 66 (CAS 137759-50-3)
Recommended Standards
- Flunarizine impurity 53 (CAS CATO-C4X-135753)
- N-(4-(2-(1,3-dioxoisoindolin-2-yl)ethyl)thiazol-2-yl)-4-nitrobenzamide (CAS 866050-86-4)
- Ceftizoxime Impurity 47 (CAS CATO-C4X-179347)
- N'-(4-((4-Fluorobenzyl)oxy)benzylidene)-2-((3-nitrophenyl)amino)acetohydrazide (CAS 303090-90-6)
- Melatonin Impurity 22 (CAS CATO-C4X-229222)
- Formoterol Impurity 20 (CAS CATO-C4X-152520)
- Acetazolamide EP Impurity D HCl (CAS 120208-98-2)
- Terbutaline impurity 123 (CAS CATO-C4X-1183123)
- 5-Butylnonan-5-ol (CAS 597-93-3)
- 2-phenyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine dihydrochloride (CAS 1177341-85-3)
- (2R,3R,4S,5R)-2-(6-Amino-2-chloro-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydrothiophene-3,4-diol (CAS 158814-07-4)
- 2-(2,5-Dimethyl-1H-pyrrol-1-yl)-5-iodopyridine (CAS 477889-91-1)
- 5-Chloro-2-isopropoxy-3-iodopyridine (CAS 1826109-98-1)
- Semaglutide impurity 255 (CAS CATO-C4X-2226255)
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