5-Bromo-1-cyclobutyl-1H-pyrazole CAS 1785567-66-9
| CAS No. | 1785567-66-9 |
| Molecular Formula | C7H9BrN2 |
| Molecular Weight | 201.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-Bromo-1-cyclobutyl-1H-pyrazole.
5-Bromo-1-cyclobutyl-1H-pyrazole (CAS 1785567-66-9), molecular formula C7H9BrN2 and molecular weight 201.06 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrile group, bromine substitution, an aromatic ring system, 5-Bromo-1-cyclobutyl-1H-pyrazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 201.06 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).
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.
As a certified reference material (CRM), 5-Bromo-1-cyclobutyl-1H-pyrazole 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 | C7H9BrN2 |
| Molecular Weight | 201.06 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 |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- 4-Bromo-1-cyclobutylpyrazole (CAS 1002309-50-3)
- 4-Bromo-5-methylbenzene-1,2-diamine (CAS 102169-44-8)
- 5-Bromo-3-ethylpyridin-2-amine (CAS 1037253-14-7)
- 5-Bromo-2,3-dimethylpyridin-4-amine (CAS 1038989-17-1)
- 3-Bromo-2-methyl-2,4,5,6-tetrahydrocyclopenta[c]pyrazole (CAS 1043920-65-5)
- 2-Bromo-4,6-dimethyl-pyridin-3-ylamine (CAS 104829-98-3)
- 2-Bromo-6-methylbenzyl Alcohol (CAS 1055969-07-7)
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Recommended Standards
- 5-Bromo-1-cyclopropyl-3-methyl-1H-pyrazole (CAS 1782471-62-8)
- 5-Bromo-3-cyclopropyl-1-methyl-1H-pyrazole (CAS 1785570-49-1)
- ((Bromomethoxy)methyl)benzene (CAS 17690-16-3)
- 4-Bromo-1-cyclopropylmethyl-1H-imidazole (CAS 1788106-22-8)
- (((9H-fluoren-9-yl)methoxy)carbonyl)-D-homoserine (CAS 461692-98-8)
- 1-(9H-Fluoren-9-yl)-3-oxo-2,7,10,13,16,19,22,25,28,31-decaoxa-4-azatritriacontan-33-oate (CAS 938190-76-2)
- 5-Bromo-3-(difluoromethyl)-4-methylpyridin-2(1H)-one (CAS 1804885-73-1)
- 6-methyl-7H-pyrrolo[2,3-d]pyrimidin-2-amine (CAS 1638760-18-5)
- 3-Bromo-4-methyl-5-nitro (1H)Indazole (CAS 1082040-52-5)
- 7-Chloroisochroman-1-one (CAS 66122-72-3)
- 4-(3,4-Dimethoxyphenyl)butanoyl chloride (CAS 348143-75-9)
- Methyl 6-amino-2-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)nicotinate (CAS 2814523-40-3)
- 1-benzylpyrrole-2-carboxylic acid (CAS 18159-22-3)
- Insulin Degludec Impurity 9 (CAS CATO-C4X-21579)
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