Quetiapine EP Impurity A CAS 844639-07-2
| CAS No. | 844639-07-2 |
| Molecular Formula | C23H27N3O3S |
| Molecular Weight | 425.54 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Quetiapine EP Impurity A (CAS 844639-07-2) is a certified pharmaceutical impurity reference standard with the molecular formula C23H27N3O3S and a molecular weight of 425.54 g/mol.
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Quetiapine EP Impurity A is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 425.54 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures Quetiapine 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.
Physical & Chemical Properties
| Molecular Formula | C23H27N3O3S |
| Molecular Weight | 425.54 g/mol |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Quetiapine Standards
- Quetiapine Carboxylate Impurity (CAS 1011758-00-1)
- Quetiapine Impurity N3 (CAS 102893-57-2)
- Quetiapine Impurity 3 (CAS CATO-C4X-12443)
- Quetiapine EP Impurity L (CAS 1371638-11-7)
- Quetiapine impurity 73 (CAS CATO-C4X-124473)
- Quetiapine Impurity 35 (CAS 329216-65-1)
- Quetiapine Impurity 51 (CAS 1185170-04-0)
- Quetiapine Impurity N2 (CAS 2206135-50-2)
Recommended Standards
- Efinaconazole Impurity 25 (CAS 2055912-03-1)
- Ritonavir Impurity 30 (CAS 144164-11-4)
- (R)-2,3-Bis(hexyloxy)propyl (2-(trimethylammonio)ethyl) phosphate 79645-39-9 (CAS 79645-39-9)
- Ritonavir Impurity 55 (CAS CATO-C4X-175155)
- Cipepofol Impurity 1 (CAS 1637741-58-2)
- Irbesartan Impurity 47 (CAS CATO-C4X-166647)
- Adefovir Impurity 22 (CAS CATO-C4X-115222)
- 4-Fluoro-N-(4-fluoro-2-methylphenyl)benzamide (CAS 876918-15-9)
- 2-(azepan-1-yl)cyclohexan-1-one (CAS 1157735-52-8)
- 2-((5-Phenylpyrimidin-2-yl)thio)acetic acid (CAS 58668-17-0)
- (E)-3-((2,4-dimethylphenyl)amino)-1-(2-phenylthiazol-5-yl)prop-2-en-1-one (CAS 338414-52-1)
- 3',5'-Dimethyl-[1,1'-biphenyl]-3-carboxylic acid (CAS 177734-84-8)
- tert-butyl N-(imidazo[1,2-a]pyridin-5-yl)carbamate (CAS 166176-53-0)
- Influenza PR8 Hemagglutinin Peptide (110-119) (H-6312.0005) (CAS 132031-50-6)
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