3-Methyl-3h-[1,2,3]triazolo[4,5-d]pyrimidine-7-thiol CAS 21323-73-9
| CAS No. | 21323-73-9 |
| Molecular Formula | C5H5N5S |
| Molecular Weight | 167.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-Methyl-3h-[1,2,3]triazolo[4,5-d]pyrimidine-7-thiol is closely related to a nitrile group, sulfur-containing functionality in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3-Methyl-3h-[1,2,3]triazolo[4,5-d]pyrimidine-7-thiol (CAS 21323-73-9), molecular formula C5H5N5S and molecular weight 167.19 g/mol, is a CATO reference standard with documented purity and traceability.
3-Methyl-3h-[1,2,3]triazolo[4,5-d]pyrimidine-7-thiol (C5H5N5S) contains a nitrile group, sulfur-containing functionality. Its physicochemical properties are representative of its class; 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.
As a certified reference material (CRM), 3-Methyl-3h-[1,2,3]triazolo[4,5-d]pyrimidine-7-thiol meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H5N5S |
| Molecular Weight | 167.19 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) | 6.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Recommended Standards
- 3-Methyl-[1,2,4]triazolo[5,1-c][1,2,4]triazine-4(1H)-thione (CAS 62170-09-6)
- 3-Methylisothiazolo[5,4-d]pyrimidin-4(5h)-one (CAS 58648-95-6)
- 3-Amino-3,4-dihydrothieno[3,2-d]pyrimidin-4-one (CAS 648859-53-4)
- 3-Methylthiazolo[4,5-c]pyridazin-6(1H)-one (CAS 82608-23-9)
- 1-[2-(4-Chlorophenyl)-4-methyl-1,3-thiazol-5-yl]ethyl N-(propan-2-yl)carbamate (CAS 478065-56-4)
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