3-Bromo-7-chloro-2,5-dimethylpyrazolo[1,5-a]pyrimidine CAS 885220-89-3
| CAS No. | 885220-89-3 |
| Molecular Formula | C8H7BrClN3 |
| Molecular Weight | 260.52 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Bromo-7-chloro-2,5-dimethylpyrazolo[1,5-a]pyrimidine 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.
3-Bromo-7-chloro-2,5-dimethylpyrazolo[1,5-a]pyrimidine (CAS 885220-89-3), molecular formula C8H7BrClN3 and molecular weight 260.52 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Bromo-7-chloro-2,5-dimethylpyrazolo[1,5-a]pyrimidine (C8H7BrClN3) is characterized by a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine/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.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C8H7BrClN3 |
| Molecular Weight | 260.52 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-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 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- 7-Bromo-2-(chloromethyl)-1-methyl-1H-imidazo[4,5-c]pyridine (CAS 1171920-75-4)
- 7-Bromo-4-chloro-2,6-dimethyl-5H-pyrrolo[3,2-d]pyrimidine (CAS 1268511-81-4)
- 7-Bromo-4-chloro-5-ethyl-5H-pyrrolo[3,2-d]pyrimidine (CAS 1384951-76-1)
- 3-Bromo-7-chloro-5,6-dimethylpyrazolo[1,5-a]pyrimidine (CAS 1429309-40-9)
- 7-Bromo-4-chloro-1-methyl-1H-indazol-3-amine (CAS 1626335-83-8)
- 6-Bromo-4-chloro-5,7-dimethylpyrrolo[2,1-f][1,2,4]triazine (CAS 1780024-55-6)
- (R)-3-(4-Bromo-6-chloropyrimidin-5-yl)butanenitrile (CAS 1889238-23-6)
- (4-Bromo-6-chloro-1H-indazol-3-yl)methanamine (CAS 1936212-22-4)
Recommended Standards
- 2-Bromo-4-chloro-1,6-dimethyl-1H-imidazo[4,5-c]pyridine (CAS 870135-18-5)
- 4-Bromo-5-chloro-6-methyl-1H-indazol-3-amine (CAS 2653202-63-0)
- 6-Bromo-4-chloro-2,7-dimethyl-7H-pyrrolo[2,3-d]pyrimidine (CAS 2488625-51-8)
- 6-Bromo-4-chloro-3-ethyl-3H-imidazo[4,5-c]pyridine (CAS 2416917-57-0)
- 1-(1-(4-Bromobenzyl)-5-methyl-1H-1,2,3-triazol-4-yl)ethan-1-one (CAS 885950-25-4)
- 2-Phenylmorpholine (CAS 23972-41-0)
- 7-(Dimethoxymethyl)pyrazolo[1,5-a]pyrimidine (CAS 930395-98-5)
- 3-(3-Chlorophenyl)-2,2-dimethylpropan-1-ol (CAS 1267954-80-2)
- Adrenaline EP Impurity E HCl (CAS 317351-39-6)
- 4-AMINO-2-(TERT-BUTYL)PHENOL TFA (CAS 1660153-64-9)
- 4-((Azetidin-3-yloxy)methyl)-2-ethylthiazole (CAS 1341538-53-1)
- N-(benzo[b]thiophen-2-ylmethyl)ethanamine hydrochloride (CAS 886505-84-6)
- 5,8-Dimethoxy-2-methylquinoline (CAS 58868-31-8)
- semaglutide (CAS 782487-28-9)
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