5-Bromo-[1,2,4]triazolo[1,5-a]pyrazine CAS 55478-78-9
| CAS No. | 55478-78-9 |
| Molecular Formula | C5H3BrN4 |
| Molecular Weight | 199.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-Bromo-[1,2,4]triazolo[1,5-a]pyrazine 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.
5-Bromo-[1,2,4]triazolo[1,5-a]pyrazine (CAS 55478-78-9), molecular formula C5H3BrN4 and molecular weight 199.01 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Bromo-[1,2,4]triazolo[1,5-a]pyrazine (C5H3BrN4) is characterized by a nitrile group, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H3BrN4 |
| Molecular Weight | 199.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 4 |
Related Bromo Standards
- 7-Bromo-[1,2,3,4]tetrazolo[1,5-a]pyridine (CAS 1130816-25-9)
- 6-Bromo-[1,2,4]triazolo[4,3-b]pyridazine (CAS 115127-23-6)
- 7-Bromo-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 120633-31-0)
- 8-Bromo-[1,2,4]triazolo[4,3-c]pyrimidine (CAS 1208084-77-8)
- 6-Bromo[1,2,4]triazolo[1,5-a]pyrazine (CAS 1233026-51-1)
- 3-Bromo-1H-pyrazolo[3,4-d]pyrimidine (CAS 1251033-27-8)
- 3-Bromo-1H-pyrazolo[3,4-c]pyridazine (CAS 1260741-42-1)
- 2-Bromo-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 1335054-80-2)
Recommended Standards
- 4-Bromo-1H-pyrazolo[3,4-d]pyrimidine (CAS 30129-51-2)
- 5-Bromo-[1,2,4]triazolo[4,3-a]pyrazine (CAS 63744-29-6)
- 4-Amino-2-bromopyrimidine-5-carbonitrile (CAS 94741-70-5)
- 5-Bromotetrazolo[1,5-a]pyridine (CAS 242815-90-3)
- 1-((4-(Phenylthio)tetrahydro-2H-pyran-4-yl)methyl)-3-(o-tolyl)urea (CAS 1797727-02-6)
- 5-(2-Chloro-4-(trifluoromethyl)phenoxy)-3,3-dimethylisobenzofuran-1(3H)-one (CAS 109140-15-0)
- 175204-08-7 2-fluoranyl-6-(4-methylphenoxy)benzenecarbonitrile 2-fluoro-6-(4-methylphenoxy)benzonitrile A811901 (CAS 175204-08-7)
- Nicorandil Nitrate (CAS 65141-58-4)
- Aripiprazole Impurity 46 (CAS CATO-C4X-100846)
- 1-amino-2-(2-chlorophenyl)propan-2-ol (CAS 71095-16-4)
- 3-(3-Iodophenyl)oxetane-3-carboxylic acid (CAS 1393560-39-8)
- 3-Benzoyl-4-(4-chlorophenyl)-1-phenylpyrrolidine (CAS 343374-84-5)
- Pimobendan Impurity 14-d3 (CAS CATO-C4X-246117)
- (Ser(PO3H2)202,Thr(PO3H2)205)-Tau Peptide (194-213) trifluoroacetate salt (CAS 2022956-55-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com