Isothiazole-5-carboxamide CAS 3683-98-5
| CAS No. | 3683-98-5 |
| Molecular Formula | C4H4N2OS |
| Molecular Weight | 128.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Isothiazole-5-carboxamide (C4H4N2OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 128.15 g/mol, it falls into the low-molecular-weight range. 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).
Isothiazole-5-carboxamide (CAS 3683-98-5), molecular formula C4H4N2OS and molecular weight 128.15 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures Isothiazole-5-carboxamide under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C4H4N2OS |
| Molecular Weight | 128.15 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Isothiazole Standards
- Isothiazole-3-carboxamide (CAS 24342-43-6)
- Isothiazole-4-carboxamide (CAS 24340-75-8)
- Isothiazole-5-carboxylic Acid (CAS 10271-85-9)
- Isothiazole-3-carboxylic acid (CAS 4576-90-3)
- Isothiazole-4-carboxylic acid (CAS 822-82-2)
- 4-Methyl-isothiazole-5-carbaldehyde (CAS 88511-33-5)
- Isothiazole-4,5-diamine (CAS 153970-46-8)
- Isothiazole-3-methanamine (CAS 40064-68-4)
Recommended Standards
- Isoxazole-3-carbothioamide (CAS 886371-53-5)
- Isoxazole-4-carbothioamide (CAS 885274-81-7)
- 6-Thioxo-1,6-dihydropyridazin-3(2H)-one (CAS 52786-73-9)
- N-(Thiazol-2-yl)formamide (CAS 25602-39-5)
- 7-Methoxy-2-methyl-5-nitro-1H-indole-3-carboxylic acid (CAS 1360955-31-2)
- 5-Chloro-1-methyl-1H-pyrazolo[4,3-d]pyrimidine (CAS 1393181-01-5)
- 4-Amino-5-(difluoromethyl)nicotinoyl chloride (CAS 1806010-67-2)
- 2-Amino-4-chloro-6-isopropylpyrimidine (CAS 73576-33-7)
- 1-(4-(3H-[1,2,3]Triazolo[4,5-b]pyridin-3-yl)phenyl)ethanone (CAS 62066-18-6)
- 5-(Piperidin-4-yl)-2,3-dihydro-1H-pyrazol-3-one (CAS 957365-77-4)
- (E)-4-(Furan-2-yl)-2-((4-(trifluoromethyl)phenyl)amino)but-3-enenitrile (CAS 834883-57-7)
- 5-Methyl-2-(propan-2-yl)cyclohexyl 2-hydroxyacetate (CAS 117356-20-4)
- Vincristine Impurity 21 (CAS CATO-C4X-208921)
- Semaglutide impurity 229 (CAS CATO-C4X-2226229)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com