Quetiapine impurity 80 HCl CAS 139079-39-3 (free base)
| CAS No. | 139079-39-3 (free base) |
| Molecular Formula | C21H25N3O3S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Quetiapine impurity 80 HCl (CAS 139079-39-3 (free base)) is a certified pharmaceutical impurity reference standard with the molecular formula C21H25N3O3SHCl and a molecular weight of 435.97 g/mol.
The molecular framework of Quetiapine impurity 80 HCl (C21H25N3O3SHCl) is characterized by a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Quetiapine impurity 80 HCl 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 | C21H25N3O3S HCl |
| Molecular Weight | 435.97 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Quetiapine Standards
- Quetiapine Carboxylate Impurity (CAS 1011758-00-1)
- Quetiapine EP Impurity P (CAS 1011758-03-4)
- Quetiapine EP Impurity P Hemifumarate (CAS 1011758-03-4（free base）)
- Quetiapine Impurity 56 (CAS 1015-89-0)
- Quetiapine Impurity N3 (CAS 102893-57-2)
- Quetiapine-d8 HemifumarateDISCONTINUED. Please see Q510002. (CAS 1031703-36-2)
- Quetiapine EP Impurity H (CAS 1076199-40-0)
- Quetiapine (CAS 111974-69-7)
Recommended Standards
- Oseltamivir EP Impurity C-d3 HCl (CAS CATO-C4X-172032)
- Rivaroxaban Impurity 116 (CAS CATO-C4X-1090116)
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- Methyl 2-Bromobenzimidate Hydrochloride (CAS 2006277-96-7)
- 2-({5-[3-(diethylsulfamoyl)phenyl]-4-(1-methoxypropan-2-yl)-4h-1,2,4-triazol-3-yl}sulfanyl)acetic acid (CAS 745791-53-1)
- Rothindin (CAS 63347-43-3)
- N1-Methyl-N1-phenylpropane-1,3-diamine (CAS 53485-07-7)
- Ethyl 2-Hydroxycyclopentanecarboxylate (CAS 54972-10-0)
- 6-Allyl-3-methyl-3H-imidazo[4,5-b]pyridine (CAS 1171920-77-6)
- D-Val23-Tirzepatide (CAS CATO-CPTD788911)
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