4-Methylbenzo[d]thiazole-5-carboxylic acid CAS 305381-68-4
| CAS No. | 305381-68-4 |
| Molecular Formula | C9H7NO2S |
| Molecular Weight | 193.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4-Methylbenzo[d]thiazole-5-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
4-Methylbenzo[d]thiazole-5-carboxylic acid (CAS 305381-68-4), molecular formula C9H7NO2S and molecular weight 193.22 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H7NO2S, 4-Methylbenzo[d]thiazole-5-carboxylic acid contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 193.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C9H7NO2S |
| Molecular Weight | 193.22 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methylbenzo Standards
- 3-Methylbenzo[d]isothiazole-5-carboxylic acid (CAS 135085-95-9)
- 2-Methylbenzo[d]thiazole-5-carboxylic acid (CAS 24851-69-2)
- 3-Methylbenzo[g]isoquinoline (CAS 19339-12-9)
- 2-Methylbenzo[h]quinoline (CAS 605-88-9)
- 3-Methylbenzo[f]quinoline (CAS 85-06-3)
- 1-(2-Methylbenzo[d]thiazol-5-yl)ethanol (CAS 20077-87-6)
- (2-Methylbenzo[d]thiazol-5-yl)boronic acid (CAS 590417-67-7)
- 1-(6-Methylbenzo[d][1,3]dioxol-5-yl)urea (CAS 881591-66-8)
Recommended Standards
- 4-Methoxycarbonylphenyl isothiocyanate (CAS 3662-78-0)
- 5-(2-Fluorophenyl)-2-piperidone (CAS 80942-15-0)
- 4-Cyano-3-(methylthio)benzoic acid (CAS 854696-88-1)
- 5-(3-Fluorooxetan-3-yl)isoindoline (CAS 905275-42-5)
- 3-Phenylfuran-2,5-dione (CAS 36122-35-7)
- 4-(3-Bromophenyl)-N-(2-methoxyphenyl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxamide (CAS 493017-13-3)
- Methyl 2-hydroxy-8-methyl-4-oxo-4h-pyrido[1,2-a]pyrimidine-3-carboxylate (CAS 1105189-76-1)
- 3-(4-Benzhydryl-1-piperazinyl)-N-ethyl-1-propanamine (CAS 1040692-49-6)
- Tert-butyl ((3aS,7aR)-octahydro-3aH-isoindol-3a-yl)carbamate (CAS 1037383-91-7)
- Gadoteridol impurity 29 (CAS 213312-49-3)
- 4-Amino-6-(1H-indol-4-yl)-1,6-dihydro-1,3,5-triazine-2-thiol (CAS 1142208-44-3)
- 3-(Trifluoromethyl)-5,6,7,8-tetrahydropyrido[4,3-e][1,2,4]triazine (CAS 741737-36-0)
- 5-Fluoro-1,3-dimethyl-4-((trimethylsilyl)ethynyl)-1H-pyrazole (CAS 1392274-37-1)
- Semaglutide impurity 46 (CAS CATO-C4X-222646)
Why CATO?
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