Carbidopa Impurity 8 CAS 19728-71-3
| CAS No. | 19728-71-3 |
| Molecular Formula | C13H19NO4 |
| Molecular Weight | 253.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Carbidopa Impurity 8 (C13H19NO4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 253.29 g/mol, it falls into the medium-molecular-weight range. 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).
Carbidopa Impurity 8 (CAS 19728-71-3) is a high-purity analytical reference standard with the molecular formula C13H19NO4 and a molecular weight of 253.29 g/mol.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Carbidopa Impurity 8 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 | C13H19NO4 |
| Molecular Weight | 253.29 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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 |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Carbidopa Standards
- Carbidopa Impurity 31 (CAS 28860-96-0)
- Carbidopa EP Impurity F (CAS 1458640-32-8)
- Carbidopa Impurity 19 (CAS CATO-C4X-231019)
- rac-Carbidopa EP Impurity C (CAS 85933-19-3)
- Carbidopa Impurity 11 (CAS CATO-C4X-231011)
- Carbidopa Impurity 29 (CAS CATO-C4X-231029)
- Carbidopa EP Impurity C (CAS 84488-77-7)
- Carbidopa impurity 38 (CAS 2470439-16-6)
Recommended Standards
- Ethyl 3-(cyclopropanecarboxamido)-4-cyclopropyl-4-oxobutanoate (CAS 1956376-88-7)
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- tert-Butyl 3-((fluorosulfonyl)methyl)azetidine-1-carboxylate (CAS 1955507-07-9)
- (1S,2S,3R,4R)-3-(tert-Butoxycarbonylamino)bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (CAS 887908-99-8)
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- 2-Bromo-3,6-dichlorobenzoic Acid (CAS 21739-97-9)
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