Sitagliptin Impurity 39 CAS 1374985-05-3
| CAS No. | 1374985-05-3 |
| Molecular Formula | C11H12F3NO2 |
| Molecular Weight | N/A |
| 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 Sitagliptin Impurity 39.
Sitagliptin Impurity 39 (CAS 1374985-05-3) is a certified pharmaceutical impurity reference standard with the molecular formula C11H12F3NO2HCl and a molecular weight of 283.67 g/mol.
Sitagliptin Impurity 39 (C11H12F3NO2HCl) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C11H12F3NO2 HCl |
| Molecular Weight | 283.67 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 1 |
Related Sitagliptin Standards
- Sitagliptin Impurity 17 (CAS 1036273-20-7)
- Sitagliptin Impurity 966 (CAS 1151240-88-8)
- Sitagliptin Impurity 14 (CAS 1151240-91-3)
- Sitagliptin Impurity 12 HCl (CAS 1151240-91-3（free base）)
- Sitagliptin Impurity 77 (CAS 1152439-73-0)
- Sitagliptin Impurity 97 (CAS 1169707-29-2)
- Sitagliptin Tablets EP Impurity FP-E HCl (CAS 1204818-19-8)
- Sitagliptin Impurity 15 (CAS 1217809-78-3)
Recommended Standards
- Metaraminol Impurity 62 (CAS 53087-13-1)
- Imiquimod Impurity 2 (CAS CATO-C4X-24532)
- Mometasone Furoate EP Impurity D (CAS 83881-09-8)
- 2-Butenethioic acid, 3-methyl-, S-(1-methylethyl) ester (CAS 34365-79-2)
- 3-Chloro-N-(2-oxothiolan-3-yl)benzamide (CAS 321521-88-4)
- 3-[(4-Fluorophenyl)methyl]-4-hydroxy-1-[(3-methoxyphenyl)methyl]-1,2-dihydropyridin-2-one (CAS 478247-86-8)
- Omeprazole Impurity 24 (CAS 109371-17-7)
- (2,6-Dimethylphenyl)(3-methoxyphenyl)methanone (CAS 750633-72-8)
- Methyl1-methoxybicyclo[2.2.2]oct-5-ene-2-carboxylate (CAS 5259-50-7)
- Integrin Binding Peptide trifluoroacetate salt (CAS 278792-07-7)
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