2-Bromo-1-(1-methylcyclopentyl)ethan-1-one CAS 42253-38-3
| CAS No. | 42253-38-3 |
| Molecular Formula | C8H13BrO |
| Molecular Weight | 205.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2-Bromo-1-(1-methylcyclopentyl)ethan-1-one (CAS 42253-38-3), molecular formula C8H13BrO and molecular weight 205.09 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Bromo-1-(1-methylcyclopentyl)ethan-1-one (C8H13BrO) contains a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 205.09 g/mol, it falls into the medium-molecular-weight range. 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 | C8H13BrO |
| Molecular Weight | 205.09 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1969 |
| Halogen Content | Br-containing |
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- 2-Bromo-4-methylbenzaldehyde 2-Bromo-p-tolualdehyde 824-54-4 (CAS 824-54-4)
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Recommended Standards
- 2,3,4-trifluoro-5-nitrobenzaldehyde (CAS 2044773-58-0)
- 2-(2-Bromocyclohex-1-en-1-yl)ethan-1-ol (CAS 85236-15-3)
- 2-Bromocyclooctan-1-one (CAS 39261-18-2)
- (5-Bromobicyclo[3.1.1]Heptan-1-yl)methanol (CAS 2090833-26-2)
- 3-Amino-5-methoxy-2-nitropyridine (CAS 1476730-34-3)
- 2-Amino-4-(1h-indazol-1-yl)butanamide (CAS 1310085-01-8)
- 2-[(3-Ethoxycarbonyl-Propyl)-(Toluene-4-Sulfonyl)-Amino]-Benzoic Acid Methyl Ester (CAS 100627-39-2)
- n-((1-Ethylpyrrolidin-2-yl)methyl)-2-fluorobenzamide (CAS 1179588-52-3)
- 2,2'-(Ethane-1,2-diylbis((phosphonomethyl)azanediyl))diacetic acid (CAS 2310-83-0)
- 4-Hydroxy-2H-thiochromen-2-one (CAS 16854-67-4)
- 4-(5-Amino-1,3,4-thiadiazol-2-yl)-1-(m-tolyl)pyrrolidin-2-one (CAS 1142202-29-6)
- 1-(4-Methylbenzenesulfonyl)-3-[(5-methylthiophen-2-yl)methyl]-3-(pyrazin-2-yl)urea (CAS 866154-01-0)
- 7-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonamide (CAS 864544-84-3)
- Semaglutide impurity 74 (CAS CATO-C4X-222674)
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