3-Methyl-1,2,5-thiadiazole CAS 5728-06-3
| CAS No. | 5728-06-3 |
| Molecular Formula | C3H4N2S |
| Molecular Weight | 100.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methyl-1,2,5-thiadiazole (CAS 5728-06-3), molecular formula C3H4N2S and molecular weight 100.14 g/mol, is a CATO reference standard with documented purity and traceability.
3-Methyl-1,2,5-thiadiazole (C3H4N2S) 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.
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 | C3H4N2S |
| Molecular Weight | 100.14 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- 4-Methyl-1,2,3-thiadiazole (CAS 18212-62-9)
- 5-Methyl-1,2,3-thiadiazole (CAS 50406-54-7)
- 1,3,4-Thiadiazole-2-carbonitrile (CAS 1121585-02-1)
- 1,2,3-Thiadiazole-4-carbonitrile (CAS 4100-24-7)
- 1,2,3-Thiadiazole-5-carbaldehyde (CAS 10200-61-0)
- 1,2,3-Thiadiazole-4-carbaldehyde (CAS 27643-15-8)
- 1,2,5-Thiadiazole-3-carbaldehyde (CAS 75238-60-7)
- 1,2,4-thiadiazole-3,5-diamine (CAS 34283-30-2)
Recommended Standards
- 3-Aminoisothiazole (CAS 4592-62-5)
- 5-ISOTHIAZOLAMINE (CAS 82357-92-4)
- 2,4-Dihydro-3H-pyrazole-3-thione (CAS 63562-25-4)
- 1H-Imidazole-5-thiol (CAS 24748-68-3)
- 2-(Difluoromethyl)-4-hydroxy-3-methoxy-5-nitropyridine (CAS 1805481-12-2)
- N-(2-fluoro-4-hydroxyphenyl)-2-(methylthio)acetamide (CAS 1340274-94-3)
- 3-Amino-N-butyl-4-fluoro-N-methyl-1-benzothiophene-2-carboxamide (CAS 1538151-93-7)
- Dinonyl carbonate (CAS 36560-81-3)
- Ciprofloxacin Impurity 32 (CAS CATO-C4X-136232)
- Retigabine impurity 16 (CAS CATO-C4X-13156)
- 4-(3,5-Dimethylphenyl)butan-1-amine (CAS 1344212-70-9)
- 3-(Pentafluoro-λ6-sulfanyl)benzenethiol (CAS 1820618-54-9)
- (S)-tert-butyl 2-((1R,2R)-3-(benzyloxy)-1-methoxy-2-methyl-3-oxopropyl)pyrrolidine-1-carboxylate (CAS 149606-97-3)
- Semaglutide impurity 38 (CAS CATO-C4X-222638)
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