Dopamine Impurity 3 CAS 89942-72-3
| CAS No. | 89942-72-3 |
| Molecular Formula | C8H7NO4 |
| Molecular Weight | 181.15 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Dopamine Impurity 3 (C8H7NO4) 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 presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies Dopamine Impurity 3 (CAS 89942-72-3), a pharmacopoeial impurity reference standard (molecular formula C8H7NO4, MW 181.15 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
CATO manufactures Dopamine Impurity 3 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.
Physical & Chemical Properties
| Molecular Formula | C8H7NO4 |
| Molecular Weight | 181.15 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.) | 1982 |
| Nitrogen Atoms | 1 |
Related Dopamine Standards
- Dopamine Impurity 3 (CAS 108074-44-8)
- Dopamine Impurity 94 (CAS CATO-C4X-190894)
- Dopamine Impurity 14 (CAS 21581-37-3)
- Dopamine Impurity 29 (CAS 15806-29-8)
- Dopamine Impurity 31 (CAS 3213-28-3)
- Dopamine Impurity 75 (CAS 32602-66-7)
- Dopamine EP Impurity C (CAS 120-20-7)
- Dopamine Impurity 85 (CAS 763024-20-0)
Recommended Standards
- Lenalidomide Impurity 28 (CAS 13506-76-8)
- Tolvaptan Impurity 17 (CAS 1975-51-5)
- Lenalidomide Impurity 13 (CAS 1975-50-4)
- Sapropterin Impurity 1 (CAS 1131-35-7)
- Metoprolol EP Impurity H (CAS 62572-94-5)
- Solriamfetol Impurity 15 (CAS CATO-C4X-256315)
- Dexamethasone impurity 70 (CAS CATO-C4X-116570)
- Fezolinetant Impurity 4 (CAS 2854332-29-7)
- (3S,4R)-3-(Hydroxymethyl)-4-isopropyldihydrofuran-2(3H)-one (CAS 116087-32-2)
- 1,7-Dioxaspiro[4.4]nonan-4-one (CAS 2138397-15-4)
- 1-(2-Methyl-4H-furo[3,2-b]pyrrol-4-yl)ethanone (CAS 132120-23-1)
- N-benzylpropionamide (CAS 10264-12-7)
- 3-(3-Bromophenyl)-5-chloro-1,2,4-thiadiazole (CAS 1053659-07-6)
- Des-[Oct-γ-Glu-AEEA-AEEA]-Semaglutide (CAS CATO-C4X-2226112)
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