Vitamin impurity 55 CAS 38987-92-7
| CAS No. | 38987-92-7 |
| Molecular Formula | C15H23Br |
| Molecular Weight | 283.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Vitamin impurity 55 (C15H23Br) contains bromine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; 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.
Vitamin impurity 55 (CAS 38987-92-7) is a certified pharmaceutical impurity reference standard with the molecular formula C15H23Br and a molecular weight of 283.25 g/mol.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C15H23Br |
| Molecular Weight | 283.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Br-containing |
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Recommended Standards
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- 2-Amino-9-((1R,2R,3R,4R)-2-fluoro-3-hydroxy-4-(hydroxymethyl)cyclopentyl)-1H-purin-6(9H)-one(relative) (CAS 110289-24-2)
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- 7-(benzenesulfonyl)-2,4-dichloro-7H-pyrrolo[2,3-d]pyrimidine (CAS 1131992-22-7)
- 3-Methyl-4-(2-methylbenzoyl)-1-phenyl-1H-pyrazol-5(4H)-one (CAS 73087-94-2)
- (2S,4R)-1-[(tert-butoxy)carbonyl]-4- 1252640-76-8 PB36398 methanesulfonylpyrrolidine-2-carboxylic acid (CAS 1252640-76-8)
- 4-aminooxane-4-carboxamide hydrochloride (CAS 1955540-70-1)
- Semaglutide impurity 107 (CAS CATO-C4X-2226107)
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