3-Ethyl-2-((3-methylbenzyl)thio)-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4(3H)-one CAS 618879-73-5
| CAS No. | 618879-73-5 |
| Molecular Formula | C20H22N2OS2 |
| Molecular Weight | 370.53 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Ethyl-2-((3-methylbenzyl)thio)-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4(3H)-one 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.
3-Ethyl-2-((3-methylbenzyl)thio)-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4(3H)-one (CAS 618879-73-5), molecular formula C20H22N2OS2 and molecular weight 370.53 g/mol, is a CATO reference standard with documented purity and traceability.
3-Ethyl-2-((3-methylbenzyl)thio)-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4(3H)-one (C20H22N2OS2) contains a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C20H22N2OS2 |
| Molecular Weight | 370.53 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Ethyl Standards
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Recommended Standards
- 3-(4-butylphenyl)-2-mercapto-5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-d]pyrimidin-4(3H)-one (CAS 379255-86-4)
- 4-(3,6-Di-tert-butyl-9H-carbazol-9-yl)aniline (CAS 255829-30-2)
- 2-{[(4-tert-butylphenyl)methyl]sulfanyl}-5-[2-(methylsulfanyl)phenyl]-1,3,4-oxadiazole (CAS 339015-43-9)
- 7-tert-Butyl-2-mercapto-3-phenyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidin-4(3H)-one (CAS 312625-72-2)
- Tert-butyl (S)-5-(hydroxymethyl)-4,7-diazaspiro[2.5]Octane-7-carboxylate (CAS 2165979-32-6)
- tert-Butyl (4-chloro-5-formylthiazol-2-yl)carbamate (CAS 388594-31-8)
- (2S,3S)-3-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(2-fluorophenyl)-2-hydroxypropanoic acid (CAS 959572-41-9)
- 5-(2,5-Dimethoxy-phenyl)-2H-pyrazole-3-carboxylic acid 890621-06-4 RTR-028002 (CAS 890621-06-4)
- N-[4-(tert-Butyl)benzyl]-3-(3-phenylpropoxy)-aniline (CAS 1040690-48-9)
- 2-(8-Bromodibenzo[b,d]thiophen-1-yl)-4,6-diphenyl-1,3,5-triazine (CAS 1822310-77-9)
- 1-(tert-butylsulfanyl)-2-fluoro-4-nitrobenzene (CAS 1864061-71-1)
- Triphenyl(pyridin-2-ylmethyl)phosphonium chloride (CAS 38700-15-1)
- Methyl (S)-2-((tert-butoxycarbonyl)amino)-2-(4-hydroxyphenyl)acetate (CAS 225517-15-7)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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