4-Methylisothiazole-3-carboxylic acid CAS 1507952-32-0
| CAS No. | 1507952-32-0 |
| Molecular Formula | C5H5NO2S |
| Molecular Weight | 143.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-Methylisothiazole-3-carboxylic acid (CAS 1507952-32-0), a certified reference material (molecular formula C5H5NO2S, MW 143.16 g/mol) for analytical method development and quality control.
4-Methylisothiazole-3-carboxylic acid (C5H5NO2S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 4-Methylisothiazole-3-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 | C5H5NO2S |
| Molecular Weight | 143.16 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.) | 1992 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methylisothiazole Standards
- 5-Methylisothiazole-3-carboxylic acid (CAS 110632-59-2)
- 5-Methylisothiazole-4-carboxylic acid (CAS 1125409-67-7)
- 4-Methylisothiazole-5-carboxylic acid (CAS 15901-61-8)
- Methylisothiazole-5-carboxylate (CAS 15901-66-3)
- 3-Methylisothiazole-5-carboxylic acid (CAS 66975-83-5)
- 3-Methylisothiazole-4-carboxamide (CAS 1259065-61-6)
- Methyl 3-methylisothiazole-5-carboxylate (CAS 15901-54-9)
- Methyl 5-methylisothiazole-4-carboxylate (CAS 15901-70-9)
Recommended Standards
- 1-(3-Fluoropropyl)-1h-pyrazol-3-amine (CAS 1504237-29-9)
- 3-Amino-4-methylsulfanyl-cyclobut-3-ene-1,2-dione (CAS 152836-69-6)
- 4-Methylthiazole-2-carboxylic Acid (CAS 14542-16-6)
- 1-(3-Fluoropropyl)-1h-pyrazol-4-amine (CAS 1532926-04-7)
- 2-[({6,6-dimethylbicyclo[3.1.1]hept-2-en-2-yl}methoxy)methyl]oxirane (CAS 1005266-30-7)
- 1-(2-Amino-5-chloro-4-methoxyphenyl)ethan-1-one (CAS 2091637-75-9)
- 3-(Cyclobutanecarboxamido)-2,2,3-trimethylbutanoic acid (CAS 1478064-53-7)
- Decane-1,10-diylbis(triphenylphosphonium) bromide (CAS 917-20-4)
- 4-Hydroxy-3,3-dimethyl-1-((R)-1-phenylethyl)pyrrolidin-2-one (CAS 1788065-51-9)
- 3-(Phenylmethoxy)-1,2-propanediol 1,2-Diacetate (CAS 151121-12-9)
- 2-(9H-Fluoren-9-ylidene)-2-fluoroacetic acid (CAS 400653-14-7)
- 2-(4-Bromo-2,5-difluorophenyl)-1,3-dioxolane (CAS 940314-57-8)
- 5-Ethyl-5-hydroxy-5,7-dihydro-1H-cyclopenta[c]pyridine-1,6(2H)-dione (CAS 340268-50-0)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com