4-(3-methoxyphenyl)-1-sulfanyl-4H,5H-[1,2,4]triazolo[4,3-a]quinazolin-5-one CAS 67443-02-1
| CAS No. | 67443-02-1 |
| Molecular Formula | C16H28N4O2S |
| Molecular Weight | 340.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-(3-methoxyphenyl)-1-sulfanyl-4H,5H-[1,2,4]triazolo[4,3-a]quinazolin-5-one.
4-(3-methoxyphenyl)-1-sulfanyl-4H,5H-[1,2,4]triazolo[4,3-a]quinazolin-5-one (CAS 67443-02-1), molecular formula C16H28N4O2S and molecular weight 340.48 g/mol, is a CATO reference standard with documented purity and traceability.
4-(3-methoxyphenyl)-1-sulfanyl-4H,5H-[1,2,4]triazolo[4,3-a]quinazolin-5-one (C16H28N4O2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C16H28N4O2S |
| Molecular Weight | 340.48 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 4-(4-Methylpiperazinomethyl)-4-thiomethylbenzophenone (CAS 898783-56-7)
- 2-(2-((4-Methoxyphenyl)amino)thiazol-4-yl)acetic acid (CAS 335398-80-6)
- (S)-5-Chloro-1,2,3,4-tetrahydronaphthalen-1-amine (CAS 1213364-80-7)
- n-(4-Bromo-2-fluorophenyl)-4-chloropicolinamide (CAS 923786-09-8)
- 2-((4-Allyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(2-methoxydibenzo[b,d]furan-3-yl)acetamide (CAS 578745-65-0)
- 2-(5-bromo-6-methoxypyridin-3-yl)acetic acid (CAS 1227499-44-6)
- 4-Chloro-1-fluoro-2-(trichloromethoxy)benzene (CAS 1404193-61-8)
- (3-Phenylthiophen-2-yl)boronic acid (CAS 2225155-73-5)
- Aripiprazole Impurity 15 (CAS CATO-C4X-100815)
- Tylosin (CAS 1401-69-0)
- Mast Cell Degranulating (MCD) Peptide (CAS 32908-73-9)
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