Carbidopa EP Impurity A CAS 555-30-6
| CAS No. | 555-30-6 |
| Molecular Formula | C10H13NO4 |
| Molecular Weight | 211.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Carbidopa EP Impurity A (CAS 555-30-6), a pharmacopoeial impurity reference standard (molecular formula C10H13NO4, MW 211.21 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C10H13NO4, Carbidopa EP Impurity A contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 211.21 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C10H13NO4 |
| Molecular Weight | 211.21 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Carbidopa Standards
- Carbidopa Impurity 35 (CAS 2104012-68-0)
- Carbidopa Impurity 6 (CAS 210576-58-2)
- Carbidopa Impurity 33 (CAS CATO-C4X-231033)
- Carbidopa Impurity 4 (CAS 306748-61-8)
- Carbidopa Impurity 15 (CAS 579-27-1)
- Carbidopa EP Impurity B (CAS 18181-08-3)
- Carbidopa Impurity 12 (CAS 53832-94-3)
- Carbidopa Impurity 5 (CAS 54737-52-9)
Recommended Standards
- Troxipide Impurity 6 (CAS 3086-62-2)
- Finerenone Impurity 249 (CAS CATO-C4X-2880249)
- Epinephrine /Adrenaline Impurity 119 (CAS CATO-C4X-1849119)
- Lisadimate (CAS 136-44-7)
- Rebamipide Impurity 40 (CAS CATO-C4X-152340)
- Dexamethasone impurity 81 (CAS CATO-C4X-116581)
- Allopurinol impurity 21 (CAS CATO-C4X-145821)
- 2-Amino-9-((2-hydroxyethoxy-2-t)methyl)-1,9-dihydro-6h-purin-6-one (CAS 141294-79-3)
- rac-(1R,6S)-bicyclo[4.1.0]heptan-2-one (CAS 196488-91-2)
- 4-Chloro-N-(4-(quinoxalin-2-yloxy)phenyl)benzenesulfonamide (CAS 400080-03-7)
- N-(3-Ethoxybenzyl)(2-thienyl)methanamine (CAS 893579-42-5)
- Prudomestin (CAS 3443-28-5)
- Methyl (1S,3S)-3-hydroxycyclopentane-1-carboxylate (CAS 174292-58-1)
- Semaglutide Impurity 3 (CAS CATO-C4X-22263)
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