Atropine Impurity 32 CAS 4438-22-6
| CAS No. | 4438-22-6 |
| Molecular Formula | C17H23NO4 |
| Molecular Weight | 305.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Atropine Impurity 32 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 305.37 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Atropine Impurity 32 (CAS 4438-22-6), a pharmacopoeial impurity reference standard (molecular formula C17H23NO4, MW 305.37 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.
As a certified reference material (CRM), Atropine Impurity 32 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 | C17H23NO4 |
| Molecular Weight | 305.37 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Atropine Standards
- Atropine EP Impurity E(7-Hydroxyhyoscyamine) (CAS 949092-65-3)
- Atropine EP Impurity D(6-hydroxyhyoscyamine) (CAS CATO-C4X-148914)
- Atropine Sulfate EP Impurity D (CAS CATO-C4X-148939)
- Atropine N-Oxide (CAS CATO-C4X-148941)
- Atropine Impurity 49 (CAS CATO-C4X-148949)
- Atropine Impurity 50 (CAS CATO-C4X-148950)
- Atropine Impurity 51 (CAS CATO-C4X-148951)
- Atropine Impurity 53 (CAS CATO-C4X-148953)
Recommended Standards
- N-Nitroso Desloratadine Impurity A (CAS CATO-C4X-143056)
- Bendamustine Impurity 27 (CAS 1366085-72-4)
- tert-butyl (2-(2-((tert-butoxycarbonyl)oxy)ethoxy)ethyl)carbamate (CAS CATO-C3D-263235)
- 203510-68-3 1H-Indol-3-yl(4-phenylpiperazino)methanone MFCD03305786 (CAS 203510-68-3)
- N-Nitroso Morantel impurity 6 (CAS 2680529-63-7)
- Hydrochlorothiazide Impurity 50 (CAS CATO-C4X-117750)
- Ruxolitinib Impurity 35 (CAS CATO-C4X-205835)
- 3-Chloro-4-(cyclohexylmethoxy)aniline (CAS 76253-36-6)
- 4-Hydroxy-8-methylquinoline-3-carbonitrile (CAS 61338-31-6)
- n1,n1-Diethyl-2-methylpropane-1,3-diamine (CAS 889889-06-9)
- Dipropylene Glycol Dimethyl Ether (mixture of isomers) (CAS 189354-80-1)
- 4-Ethyl-3-(methylthio)-1,5-diphenyl-1H-pyrazole (CAS 871110-28-0)
- Ethyl 5-acetylpicolinate (CAS 99060-45-4)
- [y-Glu3]-Semaglutide Impurity 135 (CAS CATO-C4X-2226135)
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