4-{5H,6H,7H,8H-[1,2,4]Triazolo[4,3-a]pyrimidin-3-yl}pyridine CAS 157871-55-1
| CAS No. | 157871-55-1 |
| Molecular Formula | C10H11N5 |
| Molecular Weight | 201.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-{5H,6H,7H,8H-[1,2,4]Triazolo[4,3-a]pyrimidin-3-yl}pyridine (CAS 157871-55-1), molecular formula C10H11N5 and molecular weight 201.23 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, 4-{5H,6H,7H,8H-[1,2,4]Triazolo[4,3-a]pyrimidin-3-yl}pyridine is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 201.23 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C10H11N5 |
| Molecular Weight | 201.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 5 |
Recommended Standards
- 7-amino-5-methyl-2H-pyrazolo[4,3-d]pyrimidine-3-carboxylic acid (CAS 1542566-71-1)
- 1-Methyl-4-((1-methyl-1H-pyrazol-4-yl)ethynyl)-1H-pyrazol-5-amine (CAS 1710301-69-1)
- 5-amino-7-methyl-1H-pyrazolo[4,3-d]pyrimidine-3-carboxylic acid (CAS 1522887-30-4)
- 6-Benzyl-1,3,5-triazine-2,4-diamine (CAS 1853-88-9)
- N-((4-Methoxytetrahydro-2H-thiopyran-4-yl)methyl)-3-(4-(methylthio)phenyl)acrylamide (CAS 2035003-51-9)
- tert-Butyl (3-(4-bromo-2-chlorophenoxy)propyl)(cyclopropyl)carbamate (CAS 1704082-81-4)
- 4-Chloro-5-(difluoromethyl)-2-fluorothiazole (CAS 105315-45-5)
- n-(1-Hydroxybutan-2-yl)-2-methoxy-5-methylbenzenesulfonamide (CAS 942771-71-3)
- N,N-Bis(trifluoroacetyl)-L-Cystine Dimethyl Ester (CAS 1492-83-7)
- 5-chloro-2-nitro-pyridin-3-ol (CAS 936247-35-7)
- 3-Bromo-2-(cyclopentyloxy)pyridine (CAS 1247429-75-9)
- Ethyl 2-bromo-1-isopropyl-4-methyl-1H-imidazole-5-carboxylate (CAS 1708026-90-7)
- 5-[2-(Trifluoromethyl)phenyl]isoxazole-3-carboxylic Acid (CAS 668971-05-9)
- Insulin Degludec Impurity 3 (CAS CATO-C4X-21573)
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