Isothiazole-4-carboxylic acid CAS 822-82-2
| CAS No. | 822-82-2 |
| Molecular Formula | C4H3NO2S |
| Molecular Weight | 129.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Isothiazole-4-carboxylic acid (C4H3NO2S) 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 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 129.14 g/mol, it falls into the low-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.
CATO supplies Isothiazole-4-carboxylic acid (CAS 822-82-2), a certified reference material (molecular formula C4H3NO2S, MW 129.14 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.
CATO manufactures Isothiazole-4-carboxylic acid 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 | 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.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Isothiazole Standards
- Isothiazole-5-carboxylic Acid (CAS 10271-85-9)
- Isothiazole-3-carboxylic acid (CAS 4576-90-3)
- 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
- N-(1,3,4-Thiadiazol-2-yl)formamide (CAS 26861-89-2)
- 5-Amino-4-fluoro-1,3-dimethyl-1H-pyrazole (CAS 96886-29-2)
- sodium 1,3-thiazole-5-carboxylate (CAS 26862-80-6)
- 5-Amino-1,3,4-thiadiazole-2-carbaldehyde (CAS 29422-54-6)
- 5-(Aminomethyl)-4-(propan-2-yl)-4h-1,2,4-triazole-3-thiol hydrochloride (CAS 1258639-70-1)
- 3-Fluoro-4-(2-methylphenyl)benzoic acid (CAS 1284813-06-4)
- 6-(Difluoromethyl)-1,2-dihydro-4-hydroxy-2-oxo-3-pyridinecarbonitrile (CAS 1804712-10-4)
- (Z)-3-Methyl-4-((propylthio)methylene)isoxazol-5(4H)-one (CAS 61861-38-9)
- Methyl 3-(4-chloro-3-nitrophenyl)-3-oxopropanoate (CAS 677326-73-7)
- Tert-butyl ((1-(2-fluorobenzoyl)piperidin-4-yl)methyl)carbamate (CAS 1258755-59-7)
- 2,5-Furandicarboxylic acid (CAS 3238-40-2)
- 1-(1,2-dihydro-5-acenaphthylenyl)-1-ethanone (CAS 10047-18-4)
- 2-(1-(5-Methylfuran-2-yl)ethyl)cyclopentanone (CAS 89225-03-6)
- Acetyl Hexapeptide-38 (CAS 1400634-44-7)
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