5-Ethyl-2-mercapto-6-methyl-3-(m-tolyl)thieno[2,3-d]pyrimidin-4(3h)-one CAS 571155-93-6
| CAS No. | 571155-93-6 |
| Molecular Formula | C16H16N2OS2 |
| Molecular Weight | 316.44 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.
5-Ethyl-2-mercapto-6-methyl-3-(m-tolyl)thieno[2,3-d]pyrimidin-4(3h)-one (CAS 571155-93-6) is a high-purity analytical reference standard with the molecular formula C16H16N2OS2 and a molecular weight of 316.44 g/mol.
5-Ethyl-2-mercapto-6-methyl-3-(m-tolyl)thieno[2,3-d]pyrimidin-4(3h)-one (C16H16N2OS2) contains a nitrogen-containing heterocyclic scaffold, 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.
As a certified reference material (CRM), 5-Ethyl-2-mercapto-6-methyl-3-(m-tolyl)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.
Physical & Chemical Properties
| Molecular Formula | C16H16N2OS2 |
| Molecular Weight | 316.44 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
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Recommended Standards
- 5-Ethyl-2-(4-methoxyphenyl)-6-methylthieno[2,3-d]pyrimidine-4-thiol (CAS 917747-92-3)
- Benzyl 2-[(1E)-3-(diethylamino)prop-1-en-1-yl]pyrrolidine-1-carboxylate (CAS 956194-87-9)
- 5-(4-Ethyl-5-(methylthio)-4H-1,2,4-triazol-3-yl)-4-methyl-2-phenylthiazole (CAS 219860-31-8)
- Butalamine (CAS 22131-35-7)
- tert-Butyl (3R,4R)-3,4-diaminopyrrolidine-1-carboxylate (CAS 503552-68-9)
- 1-(6-Methyl-1H-benzo[d]imidazol-1-yl)ethanone (CAS 84445-82-9)
- 2-Chloro-N-(2,5-dihydroxy-phenyl)-acetamide (CAS 102580-34-7)
- 1-Methyl-1H-pyrrole-3-sulfonic acid (CAS 728861-46-9)
- 5-Methyl-1H-indazole-4-carboxylic acid (CAS 1360927-57-6)
- N-((5-Fluorothiophen-2-yl)methyl)-1-isobutyl-5-methyl-1H-pyrazol-3-amine hydrochloride (CAS 1856033-16-3)
- 2-((S)-3-(1-Methyl-1H-imidazol-5-yl)-2-((S)-5-oxopyrrolidine-2-carboxamido)propanamido)acetic acid (CAS 63134-15-6)
- N-((6-Chloropyridin-3-yl)methyl)thiazol-2-amine hydrochloride (CAS 1046802-02-1)
- 2-(3-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane (CAS 223799-25-5)
- PACAP-Related Peptide (PRP), rat (CAS 132769-35-8)
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