Quinapril EP Impurity A CAS 74163-81-8
| CAS No. | 74163-81-8 |
| Molecular Formula | C10H11NO2 |
| Molecular Weight | 177.20 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Quinapril EP Impurity A 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.
Quinapril EP Impurity A (CAS 74163-81-8) is a certified pharmaceutical impurity reference standard with the molecular formula C10H11NO2 and a molecular weight of 177.20 g/mol.
Based on its molecular formula C10H11NO2, Quinapril 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 177.20 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C10H11NO2 |
| Molecular Weight | 177.20 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 1 |
Related Quinapril Standards
- Quinapril Bicyclic Acid Benzyl Ester (CAS 103733-30-8)
- Quinapril ethyl ester maleic acid salt (CAS 103733-36-4)
- Quinapril hydrochloride (CAS 82586-55-8)
- Quinapril Hydrochloride EP Impurity H (CAS CATO-C4X-17415)
- Quinapril EP Impurity C (CAS 82768-85-2)
- Quinapril EP Impurity C-d5 (CAS 1279034-23-9)
- Quinapril EP Impurity D (CAS 103733-49-9)
- Quinapril impurity 3 (CAS CATO-C4X-17413)
Recommended Standards
- D-1,2,3,4-Tetrahydroisoquinoline-3-carboxylic acid (CAS 103733-65-9)
- PT141(Brmelanotide) (CAS 32780-32-8)
- Acetoacetanilide (CAS 102-01-2)
- N-Nitrosonornicotine (CAS 80508-23-2)
- Mometasone Furoate EP Impurity A (CAS 83880-65-3)
- Dronedarone Impurity 22 (CAS CATO-C4X-109222)
- Dolutegravir Impurity 13 (CAS 1646862-02-3)
- 7-Chloro-5-nitro-1H-indole (CAS 196205-09-1)
- Methyl 5-(3,4-dichlorophenyl)-5-oxopentanoate (CAS 1443311-62-3)
- (5S,8s)-8-amino-2-azaspiro[4.5]Decan-3-one (CAS 1932573-73-3)
- (1R,5R)-3-Cbz-3,6-diazabicyclo[3.2.0]heptane (CAS 370881-68-8)
- Benzbromarone Impurity 31 (CAS CATO-C4X-225031)
- Cleroindicin E (CAS 165197-71-7)
- [y-Glu15]-Semaglutide Impurity 134 (CAS CATO-C4X-2226134)
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