Phentolamine Impurity 25 CAS CATO-C4X-224725
| CAS No. | CATO-C4X-224725 |
| Molecular Formula | C18H21N3O3S |
| Molecular Weight | 359.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Phentolamine Impurity 25 (CAS CATO-C4X-224725), a pharmacopoeial impurity reference standard (molecular formula C18H21N3O3S, MW 359.44 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H21N3O3S, Phentolamine Impurity 25 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 359.44 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), Phentolamine Impurity 25 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 | C18H21N3O3S |
| Molecular Weight | 359.44 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Phentolamine Standards
- Phentolamine Mesilate Impurity 5 (CAS CATO-C4X-22475)
- Phentolamine Impurity 15 (CAS CATO-C4X-224715)
- Phentolamine Impurity 26 (CAS CATO-C4X-224726)
- Phentolamine Impurity 27 (CAS CATO-C4X-224727)
- Phentolamine Impurity 8 (CAS 2767988-83-8)
- Phentolamine Impurity 21 (CAS CATO-C4X-224721)
- Phentolamine Impurity 16 (CAS CATO-C4X-224716)
- Phentolamine Impurity 19 (CAS CATO-C4X-224719)
Recommended Standards
- Diphenoxylate Impurity 4 (CAS 84255-02-7)
- Febuxostat Impurity 83 (CAS CATO-C4X-116283)
- Rabeprazole (CAS 117976-89-3)
- Rabeprazole Impurity 14 (CAS 924663-40-1)
- Ritonavir EP Impurity M (CAS CATO-C4X-175114)
- Miconazole EP Impurity G (CAS 909277-71-0)
- Linagliptin Impurity 111 (CAS CATO-C4X-1101111)
- tert-Butyl 4-formylisoindoline-2-carboxylate (CAS 1049677-40-8)
- 2-Chloro-N-((4-ethylphenyl)(3-fluorophenyl)methyl)acetamide (CAS 853724-03-5)
- Methyl 2-((3-(2-benzamidoethyl)-[1,2,4]triazolo[4,3-b]pyridazin-6-yl)thio)butanoate (CAS 893993-22-1)
- H-Val-OEt · HCl (CAS 17609-47-1)
- 3-(Methoxymethyl)azetidineHCl (CAS 942308-06-7)
- Methyl (2S,4S)-4-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)pyrrolidine-2-carboxylate hydrochloride (CAS 1279038-07-1)
- Glucagon (19-29) (human, rat, porcine) (CAS 64790-15-4)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com