4-Methyl-1,2,3-thiadiazole-5-carboxylic Acid CAS 18212-21-0
| CAS No. | 18212-21-0 |
| Molecular Formula | C4H4N2O2S |
| Molecular Weight | 144.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, 4-Methyl-1,2,3-thiadiazole-5-carboxylic Acid is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 144.15 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO supplies 4-Methyl-1,2,3-thiadiazole-5-carboxylic Acid (CAS 18212-21-0), a certified reference material (molecular formula C4H4N2O2S, MW 144.15 g/mol) for analytical method development and quality control.
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), 4-Methyl-1,2,3-thiadiazole-5-carboxylic Acid 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 | C4H4N2O2S |
| Molecular Weight | 144.15 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- Methyl 1,3,4-thiadiazole-2-carboxylate (CAS 1330751-02-4)
- 4-Methyl-1,2,5-thiadiazole-3-carboxylic acid (CAS 99390-23-5)
- 5-Methyl-1,2,3-thiadiazole-4-carboxylic acid (CAS 22097-10-5)
- 5-Methyl-1,3,4-thiadiazole-2-carboxylic Acid (CAS 501698-31-3)
- Methyl 1,2,3-thiadiazole-4-carboxylate (CAS 3989-35-3)
- Methyl 1,2,3-thiadiazole-5-carboxylate (CAS 81699-19-6)
- methyl 1,2,5-thiadiazole-3-carboxylate (CAS 63875-20-7)
- 1,3,4-Thiadiazole-2-carbohydrazide (CAS 1330755-61-7)
Recommended Standards
- 4H-1Lambda6-thiopyran-1,1,4-trione (CAS 17396-38-2)
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- 2-Amino-6-hydroxypyrimidin-4(1H)-one (CAS 56-09-7)
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- Strontium iodide (CAS 10476-86-5)
- N-(4-Amino-2-methylphenyl)-4-fluorobenzamide (CAS 926231-80-3)
- 4-Ethenyl-2,6-dimethylpyrimidine (CAS 127588-28-7)
- MG 132 (CAS 133407-82-6)
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