Dopamine EP Impurity B CAS 554-52-9
| CAS No. | 554-52-9 |
| Molecular Formula | C9H13NO2 |
| Molecular Weight | 167.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Dopamine EP Impurity B (C9H13NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO supplies Dopamine EP Impurity B (CAS 554-52-9), a pharmacopoeial impurity reference standard (molecular formula C9H13NO2, MW 167.21 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), Dopamine EP Impurity B meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H13NO2 |
| Molecular Weight | 167.21 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 |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Dopamine Standards
- Dopamine EP Impurity A (CAS 3213-30-7)
- Dopamine Impurity 17 (CAS 1129-53-9)
- Dopamine Impurity 81 (CAS 68929-11-3)
- Dopamine Impurity 82 (CAS 5663-54-7)
- Dopamine Impurity 83 (CAS CATO-C4X-190883)
- Dopamine Impurity 84 (CAS CATO-C4X-190884)
- Dopamine Impurity 99 (CAS CATO-C4X-190899)
- Dopamine Impurity 32 (CAS 138-65-8)
Recommended Standards
- Methoxamine Impurity 23 (CAS 100840-93-5)
- Adrenaline Impurity 47 (CAS CATO-C4X-184947)
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- Adrenaline Impurity 22 (CAS 575-81-5)
- Piperacillin Sodium EP Impurity G (CAS 63422-71-9)
- Phenylephrine Impurity 64 (CAS CATO-C4X-146764)
- Bisacodyl Impurity 14 (CAS 100378-86-7)
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Why CATO?
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com