3,4-Dimethoxy-1,2,5-thiadiazole 1-oxide CAS 78441-23-3
| CAS No. | 78441-23-3 |
| Molecular Formula | C4H8N2O3S |
| Molecular Weight | 164.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3,4-Dimethoxy-1,2,5-thiadiazole 1-oxide (CAS 78441-23-3), molecular formula C4H8N2O3S and molecular weight 164.18 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3,4-Dimethoxy-1,2,5-thiadiazole 1-oxide (C4H8N2O3S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 164.18 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 | C4H8N2O3S |
| Molecular Weight | 164.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Dimethoxy Standards
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Recommended Standards
- 3-(difluoromethyl)-1-methyl-pyrazole-4-thiol (CAS 2055255-83-7)
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- Semaglutide-d15 (CAS 910463-68-2(non-labelled))
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