4-Bromo-2-((tert-butoxycarbonyl)amino)butanoic acid CAS 637008-54-9
| CAS No. | 637008-54-9 |
| Molecular Formula | C9H16BrNO4 |
| Molecular Weight | 282.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-Bromo-2-((tert-butoxycarbonyl)amino)butanoic acid (CAS 637008-54-9), molecular formula C9H16BrNO4 and molecular weight 282.13 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, 4-Bromo-2-((tert-butoxycarbonyl)amino)butanoic acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 282.13 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.
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 | C9H16BrNO4 |
| Molecular Weight | 282.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
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- 2-Amino-n-[1-(furan-2-yl)ethyl]-4-methylpentanamide hydrochloride (CAS 1423023-85-1)
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- 1-(4-Bromophenyl)-3-(2-ethoxyphenyl)-2-propen-1-one (CAS 39059-90-0)
- Tirzepatide Impurity 59 (CAS CATO-C4X-324059)
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