Dopamine Impurity 2 CAS 39816-35-8
| CAS No. | 39816-35-8 |
| Molecular Formula | C9H9NO4 |
| Molecular Weight | 195.17 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 195.17 g/mol gives Dopamine Impurity 2 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Dopamine Impurity 2 (CAS 39816-35-8), a pharmacopoeial impurity reference standard (molecular formula C9H9NO4, MW 195.17 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Dopamine Impurity 2 (C9H9NO4) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
As a certified reference material (CRM), Dopamine Impurity 2 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 | C9H9NO4 |
| Molecular Weight | 195.17 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 1 |
Related Dopamine Standards
- Dopamine Impurity 11 (CAS 22568-51-0)
- Dopamine Impurity 18 (CAS 5663-56-9)
- Dopamine Impurity 63 (CAS 5663-55-8)
- Dopamine impurity 120 (CAS 3490-09-3)
- Dopamine Impurity 105 (CAS CATO-C4X-1908105)
- Dopamine Impurity 30 (CAS 339186-39-9)
- Dopamine Impurity 70 (CAS 528594-30-1)
- Dopamine Impurity 59 (CAS 6924-15-8)
Recommended Standards
- Tetracaine Impurity 13 (CAS 99-77-4)
- Lenalidomide Impurity 24 (CAS 5471-82-9)
- Glucosamine Hydrochloride Impurity F (CAS 3646-68-2)
- Lenalidomide Impurity 23 (CAS 24078-21-5)
- Ivabradine Impurity 26 (CAS 20925-64-8)
- Faropenem Impurity 9 (CAS CATO-C4X-12899)
- Ticagrelor EP Impurity B (CAS 1788033-05-5)
- 3-Chloro-2-(2-fluorophenyl)pyridine (CAS 387827-67-0)
- 1-Methyl-N-((2-methylthiazol-4-yl)methyl)-1H-pyrazol-3-amine (CAS 1183526-35-3)
- 2-(Aminomethyl)-5-bromo-6-(difluoromethyl)pyridine-3-carboxaldehyde (CAS 1805254-51-6)
- 5-Amino-2-chloro-N-isopentylbenzamide (CAS 1016499-29-8)
- (E)-N'-(1-(5-Bromo-2-isobutoxyphenyl)-2,2,2-trifluoroethylidene)-2-(trifluoromethyl)benzenesulfonohydrazide (CAS 2738683-74-2)
- 4-Bromo-2-(2-(bromomethyl)butyl)thiophene (CAS 1494143-25-7)
- Insulin Glulisine (CAS 207748-29-6)
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