9H-Xanthene-9-thione CAS 492-21-7
| CAS No. | 492-21-7 |
| Molecular Formula | C13H8OS |
| Molecular Weight | 212.27 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 9H-Xanthene-9-thione.
9H-Xanthene-9-thione (CAS 492-21-7), molecular formula C13H8OS and molecular weight 212.27 g/mol, is a CATO reference standard with documented purity and traceability.
9H-Xanthene-9-thione (C13H8OS) contains sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C13H8OS |
| Molecular Weight | 212.27 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1957 |
| Sulfur Atoms | 1 |
Related H Standards
- 9H-xanthene-3,6-diamine (CAS 199116-57-9)
- 9H-Xanthene-3,6-diol (CAS 102914-73-8)
- 9H-xanthene-9-carbaldehyde (CAS 72240-47-2)
- 9H-xanthene-9-carboxamide (CAS 5813-90-1)
- 9H-xanthene-2-carboxylic acid (CAS 40274-68-8)
- 9H-xanthene-9-carbohydrazide (CAS 5484-20-8)
- 9H-Xanthene (CAS 92-83-1)
- 9H-Xanthene-9-carbonyl chloride (CAS 26454-53-5)
Recommended Standards
- 6-Phenyl-2-sulfanylpyridine-3-carbonitrile (CAS 92126-72-2)
- 2-Nitro-4-(propylthio)aniline (CAS 54393-89-4)
- 6-(Tetrahydro-2H-pyran-4-yl)-2-thioxo-2,3-dihydropyrimidin-4(1H)-one (CAS 2097978-33-9)
- Cyclopropyl 4-methylbenzenesulfonate (CAS 7761-76-4)
- tert-Butyl (2-chloro-3-(trifluoromethyl)phenyl)carbamate (CAS 908123-86-4)
- Isopropyl (3-chloro-5-(1-((6-(2-(5-ethyl-4-methylthiazol-2-yl)ethyl)-4-morpholinopyridin-2-yl)amino)ethyl)phenyl)carbamate (CAS 329716-61-2)
- 8-(piperidin-1-yl)quinolin-5-amine (CAS 856090-97-6)
- 2-(2,4-Dichlorophenyl)-3-hydroxyquinazolin-4(3H)-one (CAS 477864-73-6)
- 1-(Pyridin-2-yl)piperidine-4-carboxylic acid (CAS 685827-70-7)
- (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2-(2,4-dimethoxyphenyl)acetic acid (CAS 1260611-66-2)
- 5-bromo-3-chloro-1H-pyrazin-2-one (CAS 21943-17-9)
- Methyl 2-amino-4-methoxy-6-methylbenzoate (CAS 118718-71-1)
- 4,4,4-Trifluoro-3-trifluoromethylbut-2-enoic acid (CAS 1763-28-6)
- Tau Peptide (307-321) trifluoroacetate salt (CAS 330456-50-3)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com