2-(Thiophen-2-yl)pyrazolo[1,5-c]quinazolin-5(6H)-one CAS 178625-00-8
| CAS No. | 178625-00-8 |
| Molecular Formula | C14H9N3OS |
| Molecular Weight | 267.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(Thiophen-2-yl)pyrazolo[1,5-c]quinazolin-5(6H)-one (C14H9N3OS) 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. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
2-(Thiophen-2-yl)pyrazolo[1,5-c]quinazolin-5(6H)-one (CAS 178625-00-8), molecular formula C14H9N3OS and molecular weight 267.31 g/mol, is a CATO reference standard with documented purity and traceability.
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.
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 | C14H9N3OS |
| Molecular Weight | 267.31 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2008 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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Recommended Standards
- 5-Acetamido-n-[(methylcarbamothioyl)amino]pyridine-3-carboxamide (CAS 1421602-20-1)
- (4-oxo-5-phenyl-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)acetonitrile (CAS 926232-10-2)
- 6-Amino-9-((2R,5S)-5-(hydroxymethyl)tetrahydrofuran-2-yl)-7H-purine-8(9H)-thione (CAS 137960-58-8)
- (9H-Purin-6-yl)methionine (CAS 6271-36-9)
- (R)-2-Amino-3-(4-(trifluoromethyl)phenyl)propanoic acid hydrochloride (CAS 122839-50-3)
- 2-Amino-N-(2-fluorobenzyl)-N-methylpentanamide hydrochloride (CAS 1423024-72-9)
- 6-butylpiperidine-3-carboxylic acid hydrochloride (CAS 1803603-57-7)
- (R)-2-Hydroxy-2-phenylpropionic Acid (CAS 3966-30-1)
- 1-(3-Methyl-1,2,4-oxadiazol-5-yl)cyclopropan-1-amine (CAS 1159878-18-8)
- tert-Butyl 2-(((methylsulfonyl)oxy)methyl)azetidine-1-carboxylate (CAS 887588-86-5)
- 7-Chloro-5-((3-methyl-1H-indol-7-yl)amino)pyrido[3,4-d]pyridazin-4(3H)-one (CAS 1564273-29-5)
- 3-[(4-Methoxyphenyl)carbamoyl]phenyl N,N-dimethylsulfamate (CAS 338405-85-9)
- 2-Carboxy-4-nitropyridine 1-oxide (CAS 14933-78-9)
- Semaglutide impurity 44 (CAS CATO-C4X-222644)
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