Isothiazole-3-carboxylic acid CAS 4576-90-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 4576-90-3 |
| Molecular Formula | C4H3NO2S |
| Molecular Weight | 129.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Isothiazole-3-carboxylic acid (CAS 4576-90-3) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C4H3NO2S. Molecular weight: 129.14 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C4H3NO2S |
| Molecular Weight | 129.14 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Isothiazole Standards
- Isothiazole-5-carboxylic Acid (CAS 10271-85-9)
- Isothiazole-4-carboxylic acid (CAS 822-82-2)
- Isothiazole-3-carboxamide (CAS 24342-43-6)
- Isothiazole-4-carboxamide (CAS 24340-75-8)
- Isothiazole-5-carboxamide (CAS 3683-98-5)
- 4-Methyl-isothiazole-5-carbaldehyde (CAS 88511-33-5)
- Isothiazole-4,5-diamine (CAS 153970-46-8)
- Methyl isothiazole-3-carboxylate (CAS 1001907-72-7)
Recommended Standards
- 5-Amino-4-fluoro-1,3-dimethyl-1H-pyrazole (CAS 96886-29-2)
- 5-Amino-1,3,4-thiadiazole-2-carbaldehyde (CAS 29422-54-6)
- N-(1,3,4-Thiadiazol-2-yl)formamide (CAS 26861-89-2)
- N-(4,6-dimethylpyridin-2-yl)benzamide (CAS 94843-50-2)
- 4-(5-Fluoropyridin-2-yl)morpholine (CAS 1287217-51-9)
- 4-Bromo-3,5-difluorobenzoic acid methyl ester, 97% (CAS 1803565-64-1)
- 3,4-Dibromo-2-fluoroanisole (CAS 1375069-24-1)
- (2,2-difluoro-1-methyl-cyclopropyl)methanesulfonyl chloride (CAS 1955548-58-9)
- Ethyl Benzoylacetate (CAS 94-02-0)
- Sperm Peptide P10G (H-2424.0001) (CAS 137353-73-2)
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