3-bromo-4-fluoro-1H-pyrazole CAS 1621526-49-5
| CAS No. | 1621526-49-5 |
| Molecular Formula | C3H6BrFN2 |
| Molecular Weight | 169.00 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-bromo-4-fluoro-1H-pyrazole (CAS 1621526-49-5), a certified reference material (molecular formula C3H6BrFN2, MW 169.00 g/mol) for analytical method development and quality control.
Owing to fluorine/bromine substitution, 3-bromo-4-fluoro-1H-pyrazole is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 169.00 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C3H6BrFN2 |
| Molecular Weight | 169.00 g/mol |
| 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | F/Br-containing |
| Nitrogen Atoms | 2 |
Related bromo Standards
- 4-bromo-3-fluoro-1H-pyrazole (CAS 1346555-56-3)
- 1-Bromo-1-Fluoro-2-Butanone (CAS 54867-88-8)
- 3-bromo-4-fluoro-tetrahydrofuran (CAS 2201012-00-0)
- 1-Bromo-2-(methoxymethoxy)ethane (CAS 112496-94-3)
- 1-Bromo-3-methoxypropan-2-ol (CAS 135295-88-4)
- 4-Bromo-1,3-butanediol (CAS 31100-40-0)
- 2-Bromo-1,1-dimethoxyethane (CAS 7252-83-7)
- (R)-2-Bromo-3-hydroxypropanoic acid (CAS 110994-91-7)
Recommended Standards
- (2-(Methylthio)pyridin-3-yl)boronic acid (CAS 1072944-21-8)
- Ethyl Bromoacetate-1- (CAS 61203-71-2)
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- Ethyl Bromoacetate- (CAS 61898-49-5)
- 1-(2,2-difluoroethyl)-N-[4-methoxy-3-(methoxymethyl)benzyl]-1H-pyrazol-4-amine (CAS 1172372-04-1)
- 5-(Methoxymethyl)-6-methylpyridin-2-amine (CAS 882016-97-9)
- N,N'-(1,3-Dimethyl-1,3-propanediylidene)bis(2,6-dichlorobenzenamine) (CAS 445460-78-6)
- N-(4-Isobutoxybenzyl)-2-methoxy-1-ethanamine (CAS 1040686-96-1)
- Ethyl 6-oxo-3-azabicyclo[3.2.1]Octane-3-carboxylate (CAS 850991-53-6)
- 3-Amino-3-(2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)propanenitrile (CAS 338406-49-8)
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- (E)-3-(2-Ethynylthiazol-4-yl)acrylic acid (CAS 2786829-48-7)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com