Brexpiprazole Impurity 136 CAS 2657666-89-0
| CAS No. | 2657666-89-0 |
| Molecular Formula | C8H4Br2S |
| Molecular Weight | 291.99 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| 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.
CATO supplies Brexpiprazole Impurity 136 (CAS 2657666-89-0), a pharmacopoeial impurity reference standard (molecular formula C8H4Br2S, MW 291.99 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C8H4Br2S, Brexpiprazole Impurity 136 contains sulfur-containing functionality, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 291.99 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C8H4Br2S |
| Molecular Weight | 291.99 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Brexpiprazole Standards
- Brexpiprazole Impurity 29 (CAS 913614-15-0)
- Brexpiprazole Impurity 14 (CAS 203395-59-9)
- Brexpiprazole Impurity 154 (CAS 2514958-62-2)
- Brexpiprazole Impurity 162 (CAS CATO-C4X-1131162)
- Brexpiprazole impurity 112 (CAS CATO-C4X-1131112)
- Brexpiprazole Impurity 140 (CAS CATO-C4X-1131140)
- Brexpiprazole Impurity 133 (CAS 1268367-99-2)
- Brexpiprazole Impurity 164 (CAS CATO-C4X-1131164)
Recommended Standards
- 2,5-Dibromobenzo[b]thiophene (CAS 7312-17-6)
- Aroclor 1248 (CAS 12672-29-6)
- 2,3',4,5-Tetrachlorobiphenyl (CAS 73575-53-8)
- Pcb No. 40 (CAS 38444-93-8)
- Bumetanide Impurity 135 (CAS 30170-22-0)
- Calcitriol Impurity 8 (CAS 140710-96-9)
- Nafamostat impurity 80 (CAS 2055540-27-5)
- 4-(2,5-Dimethyl-1h-pyrrol-1-yl)-2-methylphenylamine (CAS 842956-16-5)
- 4-Chloro-5-ethylthiophene-2-carbohydrazide (CAS 1399657-40-9)
- 4-Dodecyl-3-methyl-1-phenyl-1H-pyrazol-5-yl ethyl carbonate (CAS 821779-83-3)
- 2-methyl-4,5,6,7-tetrahydro-2H-indazole-3-carbaldehyde (CAS 1507958-15-7)
- Z-Tyr-Val-Ala-Asp-AFC (CAS 201608-13-1)
- (5-Bromo-3-methylpyridin-2-yl)methanamine (CAS 886365-53-3)
- Acetyl decapeptide-3 (CAS 935288-50-9)
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