4-Methyl-1,2,5-thiadiazole-3-carboxylic acid CAS 99390-23-5
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 99390-23-5 |
| Molecular Formula | C4H4N2O2S |
| Molecular Weight | 144.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Methyl-1,2,5-thiadiazole-3-carboxylic acid (CAS 99390-23-5) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C4H4N2O2S. Molecular weight: 144.15 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
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.) | 1985 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Methyl Standards
- Methyl 1,3,4-thiadiazole-2-carboxylate (CAS 1330751-02-4)
- 4-Methyl-1,2,3-thiadiazole-5-carboxylic Acid (CAS 18212-21-0)
- 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
- 4-Methoxy-1,2,5-thiadiazole-3-carbaldehyde (CAS 78741-15-8)
- 4-Hydroxythiophene-3-carboxylic acid (CAS 50624-50-5)
- 4-Hydroxythiophene-2-carboxylic acid (CAS 40748-90-1)
- 4-Bromo-3-fluoro-2-methylbenzenesulfonyl chloride (CAS 1208074-74-1)
- Ethyl 3,5-dibromo-4-methoxybenzoate (CAS 122136-05-4)
- 6-bromo-8-methoxy-quinazolin-4-amine (CAS 2190538-67-9)
- 4-(Trimethylsilyl)-4H-1,2,4-triazole (CAS 18827-14-0)
- 2-Fluoro-4-methylbenzo[d]thiazole (CAS 27484-68-0)
- 2-(tert-Butyl)-3-chloro-4-cyclopropoxypyridine (CAS 1243372-57-7)
- Des-Gly34-Tirzepatide (CAS CATO-CPTD788940)
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