9-Oxo-9H-thioxanthene-4-carboxylic acid CAS 51762-56-2
| CAS No. | 51762-56-2 |
| Molecular Formula | C14H8O3S |
| Molecular Weight | 256.28 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 9-Oxo-9H-thioxanthene-4-carboxylic acid is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 9-Oxo-9H-thioxanthene-4-carboxylic acid (CAS 51762-56-2), a certified reference material (molecular formula C14H8O3S, MW 256.28 g/mol) for analytical method development and quality control.
Based on its molecular formula C14H8O3S, 9-Oxo-9H-thioxanthene-4-carboxylic acid contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 256.28 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C14H8O3S |
| Molecular Weight | 256.28 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Sulfur Atoms | 1 |
Recommended Standards
- 9-Oxo-9H-thioxanthene-3-carboxylic Acid (CAS 51762-88-0)
- Benzenesulfonamide, n-cyclobutyl-4-nitro- (CAS 477723-14-1)
- 9-Oxo-9H-thioxanthene-2-carboxylic acid (CAS 25095-94-7)
- Diethyl [(2,6-dimethylphenyl)methyl]phosphonate (CAS 902526-55-0)
- 2,4-DB-butyl ester (CAS 6753-24-8)
- 6,7-Dichloro-2,4-bis(4-fluorophenyl)phthalazin-1(2H)-one (CAS 339009-77-7)
- 2-(3-Bromophenyl)-2-methyl-1,3-dioxolane (CAS 39172-32-2)
- Cannabitriol (CAS 11003-36-4)
- 2,8-Difluoro-10,11-dihydro-5H-dibenzo[a,d][7]annulen-5-one (CAS 860625-65-6)
- N-(1-(5-methyl-1H-pyrazol-3-yl)propan-2-yl)thietan-3-amine (CAS 1933548-26-5)
- (2R,3R,4S,5S)-2-(6-Amino-9H-purin-9-yl)-5-(((3-aminophenyl)thio)methyl)tetrahydrofuran-3,4-diol (CAS 86072-47-1)
- 4-Amino-N,N-dipropylbenzenesulfonamide (CAS 21646-92-4)
- 2-{1-[(5-bromo-4,6-dimethylpyrimidin-2-yl)amino]ethylidene}-2,3-dihydro-1H-indene-1,3-dione (CAS 1024388-15-5)
- Semaglutide (CAS 910463-68-2（free base）)
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