Glipizide Impurity 21 CAS 101-99-5
| CAS No. | 101-99-5 |
| Molecular Formula | C9H11NO2 |
| Molecular Weight | 165.19 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 165.19 g/mol gives Glipizide Impurity 21 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Glipizide Impurity 21 (CAS 101-99-5, C9H11NO2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C9H11NO2, Glipizide Impurity 21 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 165.19 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C9H11NO2 |
| Molecular Weight | 165.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Glipizide Standards
Recommended Standards
- Telmisartan Impurity 88 (CAS CATO-C4X-135988)
- Dapoxetine Impurity 38 (CAS 40856-44-8)
- Nilotinib EP Impurity B (CAS 18595-18-1)
- Dapoxetine Impurity 39 (CAS 13921-90-9)
- Asenapine Impurity 3 (CAS CATO-C4X-19473)
- Xanomeline impurity 59 (CAS CATO-C4X-330159)
- Sodium Valproate Impurity 18 (CAS 542-05-2)
- 3-Cyclopropoxy-4-(difluoromethoxy)benzoic acid (CAS 672883-89-5)
- 1-Octadecylguanidine Hydrochloride (CAS 23604-21-9)
- 2-[(4-Tetrahydropyranyl)amino]isonicotinic Acid (CAS 1153379-90-8)
- 2'-Amino-5'H,7'H-spiro[cyclopropane-1,8'-pyrano[4,3-b]pyridin]-5'-one (CAS 2673370-54-0)
- NHPI-PEG3-C2-Pfp ester (CAS 2101206-87-3)
- 3-Phenylpicolinonitrile (CAS 39065-43-5)
- Semaglutide impurity 48 (CAS CATO-C4X-222648)
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