Dopamine Impurity 31 CAS 3213-28-3
| CAS No. | 3213-28-3 |
| Molecular Formula | C10H15NO2 |
| Molecular Weight | 181.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Dopamine Impurity 31 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
CATO supplies Dopamine Impurity 31 (CAS 3213-28-3), a pharmacopoeial impurity reference standard (molecular formula C10H15NO2, MW 181.23 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Dopamine Impurity 31 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 181.23 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
Physical & Chemical Properties
| Molecular Formula | C10H15NO2 |
| Molecular Weight | 181.23 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 Impurity 14 (CAS 21581-37-3)
- Dopamine Impurity 29 (CAS 15806-29-8)
- Dopamine Impurity 75 (CAS 32602-66-7)
- Dopamine EP Impurity C (CAS 120-20-7)
- Dopamine Impurity 85 (CAS 763024-20-0)
- Dopamine Impurity 86 (CAS 74321-37-2)
- Dopamine Impurity 94 (CAS CATO-C4X-190894)
- Dopamine Impurity 3 (CAS 108074-44-8)
Recommended Standards
- Methylsynephrine (CAS 365-26-4)
- Dolasetron Impurity 4 (CAS CATO-C4X-18674)
- Doxylamine impurity 25 (CAS 15260-65-8)
- Nicardipine Impurity 45 (CAS 15831-63-7)
- Fenofibrate Impurity 19 (CAS 10547-60-1)
- Dolutegravir Impurity 6 (CAS 2244161-72-4)
- Venetoclax Impurity 17 (CAS CATO-C4X-249517)
- Relugolix Impurity 170 (CAS CATO-C4X-2429170)
- 2,2,2-Trifluoroethyl n-[6-(1h-1,2,4-triazol-1-yl)pyridin-3-yl]carbamate (CAS 1221724-49-7)
- 4-Methoxyspiro[indoline-3,4'-piperidin]-2-one hydrochloride (CAS 2251054-45-0)
- (3,5-Di(pyrrolidin-1-yl)phenyl)boronic acid (CAS 2225170-56-7)
- 5-Ethynyl-2-fluorobenzonitrile (CAS 1093306-86-5)
- 3-(4-Isopropoxyphenyl)-3-(2-methoxyphenyl)propanoic acid (CAS 672891-59-7)
- Semaglutide impurity 227 (CAS CATO-C4X-2226227)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com