Dopamine Impurity 94 CAS CATO-C4X-190894
| CAS No. | CATO-C4X-190894 |
| Molecular Formula | C9H11NO3 |
| Molecular Weight | 181.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| 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 Dopamine Impurity 94.
CATO supplies Dopamine Impurity 94 (CAS CATO-C4X-190894), a pharmacopoeial impurity reference standard (molecular formula C9H11NO3, MW 181.19 g/mol) used for the identification and quantification of trace impurities in APIs.
Dopamine Impurity 94 (C9H11NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C9H11NO3 |
| Molecular Weight | 181.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | ＞95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Dopamine Standards
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- 2-([1,1'-Biphenyl]-4-yl)-4,5-diphenylthiazole (CAS 1965304-79-3)
- 4-(4-Fluorophenyl)-1-[4-(4-fluorophenyl)-1,3-thiazol-2-yl]-1H-pyrazol-5-amine (CAS 955966-80-0)
- (S)-Ethyl 2-((tert-butoxycarbonyl)amino)-3-(4-iodophenyl)propanoate (CAS 943148-40-1)
- Semaglutide Impurity 146 (CAS 2645421-68-5)
Why CATO?
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