Linagliptin impurity 167 CAS CATO-C4X-1101167
| CAS No. | CATO-C4X-1101167 |
| Molecular Formula | C21H18Br2N8O4 |
| Molecular Weight | 606.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Linagliptin impurity 167 (CAS CATO-C4X-1101167) is a certified pharmaceutical impurity reference standard with the molecular formula C21H18Br2N8O4 and a molecular weight of 606.23 g/mol.
Based on its molecular formula C21H18Br2N8O4, Linagliptin impurity 167 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 606.23 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), Linagliptin impurity 167 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 | C21H18Br2N8O4 |
| Molecular Weight | 606.23 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 8 |
Related Linagliptin Standards
- Linagliptin impurity 168 (CAS CATO-C4X-1101168)
- Linagliptin Impurity 51 (CAS 886588-63-2)
- Linagliptin Impurity 42 (CAS 2074688-81-4)
- Linagliptin Impurity 12 (CAS CATO-C4X-110112)
- Linagliptin Impurity 109 (CAS CATO-C4X-1101109)
- Linagliptin Impurity 69 (CAS CATO-C4X-110169)
- Linagliptin Impurity 123 (CAS CATO-C4X-1101123)
- Linagliptin impurity 143 (CAS 2517759-32-7)
Recommended Standards
- Haloperidol Decanoate EP Impurity F (CAS 1797131-50-0)
- Hydrazinecarbothioamide, 2,2'-[1-(2-ethoxyethyl)-1,2-ethanediylidene]bis[N-[(4-ethoxyphenyl)methyl]-, copper complex (CAS 93556-79-7)
- Haloperidol Decanoate EP Impurity E (CAS 1796933-22-6)
- Ethacrynic Acid Impurity C (CAS 25355-92-4)
- Ethacridine Lactate Impurity 9 (CAS 38246-95-6)
- Ivabradine Impurity 17 (CAS 304462-60-0)
- Argatroban Impurity 46 (CAS 57876-69-4)
- 5-Methoxy-6-nitropicolinic acid (CAS 324028-85-5)
- Oct-7-en-1-yl acetate (CAS 5048-35-1)
- 4-Fluoro-1H-pyrrolo[2,3-c]pyridine-7-carbonitrile (CAS 446284-50-0)
- 5,7-Dichloro-3H-[1,2,3]triazolo[4,5-d]pyrimidine (CAS 500338-80-7)
- Ethyl 2-Fluoroacetoacetate (CAS 1522-41-4)
- 1-(1-Acetyl-2,3-dihydro-1H-indol-5-yl)-2-chloro-1-propanone (CAS 191789-89-6)
- Endo-Pro36-Tirzepatide (CAS CATO-CPTD788688)
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