1-(4-Bromo-1H-pyrazol-1-yl)ethan-1-one CAS 34985-88-1
| CAS No. | 34985-88-1 |
| Molecular Formula | C5H5BrN2O |
| Molecular Weight | 189.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1-(4-Bromo-1H-pyrazol-1-yl)ethan-1-one is closely related to an amide group, a hydroxyl group, an ether linkage, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1-(4-Bromo-1H-pyrazol-1-yl)ethan-1-one (CAS 34985-88-1), molecular formula C5H5BrN2O and molecular weight 189.01 g/mol, is a CATO reference standard with documented purity and traceability.
1-(4-Bromo-1H-pyrazol-1-yl)ethan-1-one (C5H5BrN2O) contains an amide group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point; 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 analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1-(4-Bromo-1H-pyrazol-1-yl)ethan-1-one 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 | C5H5BrN2O |
| Molecular Weight | 189.01 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 5-Bromo-3-methylpyrazin-2-ol (CAS 100047-56-1)
- 2-Bromo-5-hydrazinylpyrazine (CAS 1001050-24-3)
- (4-bromo-1H-pyrazol-1-yl)acetaldehyde (CAS 1007550-84-6)
- 6-Bromo-2-methyl-3(2H)-pyridazinone (CAS 1123169-25-4)
- 2-Bromo-5-hydrazinylpyrimidine (CAS 1174413-61-6)
- 3-Bromo-1-methylpyrazin-2(1H)-one (CAS 1187017-25-9)
- 2-Bromo-5-methoxypyrimidine (CAS 1209459-99-3)
- 2-Bromo-3-methoxypyrazine (CAS 1209905-41-8)
Recommended Standards
- 1-(3-Bromofuran-2-yl)ethanone (CAS 22037-29-2)
- 1-(4-Bromofuran-2-yl)ethanone (CAS 3455-86-5)
- (5-Bromopyrimidin-2-yl)methanol (CAS 22433-12-1)
- 1-(5-bromo-2-furyl)ethanone (CAS 3199-50-6)
- (R)-1-(2-Benzamidoacetyl)pyrrolidine-2-carboxamide (CAS 177433-42-0)
- Benzyl (1-(methoxy(methyl)amino)-1-oxopropan-2-yl)carbamate (CAS 688763-83-9)
- 2-Methoxycycloheptan-1-amine (CAS 953889-34-4)
- 2,3-Dichloro-5-(difluoromethyl)pyridine-6-carbonyl chloride (CAS 1805239-58-0)
- N-[(Oxiran-2-yl)methoxy]cyclohexanimine (CAS 23753-42-6)
- 1-(2-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)ethyl)-1H-1,2,3-triazole-4-carbothialdehyde (CAS 957120-67-1)
- 2-(2,5-Dimethylphenyl)-3-methylquinoline-4-carbonyl chloride (CAS 1160264-98-1)
- Penehyclidine impurity 14 HCI (CAS CATO-C4X-130414)
- N-(4-(1H-Benzo[d]imidazol-2-yl)phenyl)-5,6-dihydro-1,4-dioxine-2-carboxamide (CAS 864938-66-9)
- Tau Peptide (304-318) trifluoroacetate salt (CAS 330456-49-0)
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