5-(Methylthio)pyrimido[5,4-e][1,2,4]triazine CAS 21308-97-4
| CAS No. | 21308-97-4 |
| Molecular Formula | C6H5N5S |
| Molecular Weight | 179.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 179.20 g/mol gives 5-(Methylthio)pyrimido[5,4-e][1,2,4]triazine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-(Methylthio)pyrimido[5,4-e][1,2,4]triazine (CAS 21308-97-4), molecular formula C6H5N5S and molecular weight 179.20 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-(Methylthio)pyrimido[5,4-e][1,2,4]triazine (C6H5N5S) contains a nitrile group, sulfur-containing functionality, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 179.20 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C6H5N5S |
| Molecular Weight | 179.20 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Methylthio Standards
- 2-(Methylthio)-1H-benzo[d]imidazol-1-amine (CAS 151693-49-1)
- 1-((Methylthio)methyl)-1H-benzo[d][1,2,3]triazole (CAS 183164-38-7)
- 2-(Methylthio)-1H-benzo[d]imidazol-4-amine (CAS 189045-57-6)
- 1-Methyl-2-(methylthio)-1h-imidazo[4,5-c]pyridine (CAS 7321-95-1)
- 1-Methyl-4-(methylthio)-1H-imidazo[4,5-c]pyridine (CAS 87034-79-5)
- 2-[4-(Methylthio)phenoxy]acetonitrile (CAS 43111-34-8)
- 3-(Methylthio)indolin-2-one (CAS 40800-64-4)
- 3-Methyl-2-(methylthio)-3H-imidazo[4,5-c]pyridine (CAS 7321-99-5)
Recommended Standards
- 5-(2-Pyrazinyl)-1,3,4-thiadiazol-2-amine (CAS 383130-62-9)
- 5-(Pyridin-2-yl)-1,3,4-oxadiazole-2(3H)-thione (CAS 3690-47-9)
- 5-(1,3-Thiazol-2-yl)furan-2-carbaldehyde (CAS 342601-01-8)
- 5-(Thiophen-2-yl)isoxazole-3-carbaldehyde (CAS 465514-11-8)
- 2-Methyl-1-oxo-1,2-dihydroisoquinoline-3-carboxylic Acid (CAS 89806-32-6)
- (S)-2-Methoxy-2-(naphthalen-2-yl)propanoic acid (CAS 299397-14-1)
- 3-(3-Fluorobenzoyl)-4-methylpyridine (CAS 158978-25-7)
- 2-Fluoro-N-(4-(2-oxopiperidin-1-yl)phenyl)benzamide (CAS 922864-72-0)
- 4-Chlorophenanthrene (CAS 24079-43-4)
- Dexmedetomidine Impurity 26 (CAS 603-79-2)
- (S)-2-(6-Benzhydrylpyridin-2-yl)-4-(tert-butyl)-4,5-dihydrooxazole (CAS 2570984-82-4)
- 2-Isopropyl-1,2,3,4-tetrahydroquinoline-4-carboxylic acid (CAS 1706463-78-6)
- (R)-3-Amino-2-(pyridin-3-ylmethyl)propanoic acid (CAS 1240583-16-7)
- Calcitonin C-Terminal Flanking Peptide (human) XTFA (CAS 85916-47-8（free base）)
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