4-Chloro-2,5-diphenylthieno[2,3-d]pyrimidine CAS 83548-63-4
| CAS No. | 83548-63-4 |
| Molecular Formula | C18H11ClN2S |
| Molecular Weight | 322.81 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
4-Chloro-2,5-diphenylthieno[2,3-d]pyrimidine (CAS 83548-63-4), molecular formula C18H11ClN2S and molecular weight 322.81 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution, 4-Chloro-2,5-diphenylthieno[2,3-d]pyrimidine is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 322.81 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).
As a certified reference material (CRM), 4-Chloro-2,5-diphenylthieno[2,3-d]pyrimidine 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 | C18H11ClN2S |
| Molecular Weight | 322.81 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- N1-(3-Chloro-4-methylphenyl)-N2-(2-(thiophen-2-yl)ethyl)oxalamide (CAS 1207018-17-4)
- 4-Chloro-5,6-diphenylthieno[2,3-d]pyrimidine (CAS 1208346-69-3)
- (4-Chloro-2,5-dimethylphenyl)(4-(methylsulfonyl)phenyl)methanone (CAS 1280729-47-6)
- (2E)-1-{2-[(2-chloro-1,3-thiazol-5-yl)methoxy]phenyl}-3-(dimethylamino)prop-2-en-1-one (CAS 477886-92-3)
- 1-(4-Chloro-3-methylphenyl)-2-tosylethan-1-one (CAS 946386-92-1)
- 1-(4-Chloro-6-(isopropylthio)pyrimidin-2-yl)-3-phenylurea (CAS 339017-64-0)
- 1-(6-Chloro-4-oxo-4H-thiochromen-3-yl)piperidine-4-carboxamide (CAS 895799-58-3)
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Recommended Standards
- 4-[(4-Chlorophenyl)sulfanyl]-6-(morpholin-4-yl)pyrimidin-2-amine (CAS 339016-20-5)
- 5-([1,1'-Biphenyl]-4-yl)-4-chlorothieno[2,3-d]pyrimidine (CAS 455920-14-6)
- 4-(4-Chlorophenyl)-5-[(4-fluorophenyl)sulfanyl]-1,2,3-thiadiazole (CAS 338408-07-4)
- 5-(4-Chlorophenyl)-2-(phenylsulfanyl)pyridine-3-carbonitrile (CAS 338955-03-6)
- 2-Vinyladamantane (CAS 81372-28-3)
- 2-(4-(Phenylthio)phenyl)aceticacid (CAS 6317-61-9)
- DL-Homocystine (CAS 870-93-9)
- 3-Fluoro-4-thiomorpholin-4-ylaniline (CAS 237432-11-0)
- Thiol-PEG4-alcohol (CAS 90952-27-5)
- 2-(4-Chloro-1h-indol-3-yl)acetonitrile (CAS 2447-15-6)
- 4,5-Diaminonicotinic acid (CAS 1393582-09-6)
- 5-Amino-1-(3-chloro-2-methylphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one (CAS 1416344-69-8)
- Cis-1'-Tert-Butyl 6A-Ethyl Hexahydro-1H-Spiro[Cyclopenta[C]Pyrrole-4,4'-Piperidine]-1',6A-Dicarboxylate (CAS 1273565-80-2)
- [D-His]-Semaglutide B (x TFA Salt) (CAS CATO-C4X-2226117)
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