1-(Benzo[d]thiazol-2-yl)-3-methyl-1H-pyrazol-5(4H)-one CAS 17304-62-0
| CAS No. | 17304-62-0 |
| Molecular Formula | C11H9N3OS |
| Molecular Weight | 231.27 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
1-(Benzo[d]thiazol-2-yl)-3-methyl-1H-pyrazol-5(4H)-one (CAS 17304-62-0), molecular formula C11H9N3OS and molecular weight 231.27 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 1-(Benzo[d]thiazol-2-yl)-3-methyl-1H-pyrazol-5(4H)-one (C11H9N3OS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 231.27 g/mol, it falls into the medium-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).
As a certified reference material (CRM), 1-(Benzo[d]thiazol-2-yl)-3-methyl-1H-pyrazol-5(4H)-one 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.
Physical & Chemical Properties
| Molecular Formula | C11H9N3OS |
| Molecular Weight | 231.27 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Benzo Standards
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- (1-(Benzo[d]oxazol-2-yl)piperidin-4-yl)methanamine (CAS 137289-71-5)
- (E)-1-(Benzo[d][1,3]dioxol-5-yl)-N-cyclohexylmethanimine (CAS 934022-80-7)
- 1-(1H-benzo[d][1,2,3]triazol-1-yl)heptan-1-one (CAS 331672-95-8)
- 4-((1H-benzo[d]imidazol-1-yl)methyl)piperidin-4-ol (CAS 949100-26-9)
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Recommended Standards
- 8-Methyl-8h-thieno[2,3-b]indole-2-carboxylic acid (CAS 172869-21-5)
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- Ethyl 2-cyano-2-(1,1-dioxo-1λ6-thiolan-3-yl)acetate (CAS 17134-14-4)
- tert-butyl (5-(hydroxymethyl)-1,3,4-thiadiazol-2-yl)carbamate (CAS 1824119-90-5)
- 2-Methyl-1-(3-(trifluoromethoxy)phenyl)propan-1-one (CAS 1343298-84-9)
- 2-(4-Chlorothiophen-3-yl)-4,4,5-trimethyl-1,3,2-dioxaborinane (CAS 2096997-84-9)
- 1-(2-(3,4-Dichlorophenoxy)-5-fluorophenyl)-N-methylmethanamine (CAS 289716-94-5)
- 2-Chloro-3-(4-methylpiperazin-1-yl)naphthalene-1,4-dione (CAS 6312-48-7)
- Levocabastine impurity 16 (CAS CATO-C4X-228916)
- Ethyl 2,5-dihydro-5-oxo-1-[3-(trifluoromethyl)phenyl]-1H-1,2,4-triazole-3-carboxylate (CAS 1000576-65-7)
- [β-Asp8]Terlipressin TFA (CAS CATO-C4X-219318)
- tert-Butyl (S)-(2,6-dioxotetrahydro-2H-pyran-3-yl)carbamate (CAS 2420-13-5)
- Tetradecanal (CAS 124-25-4)
- Tirzepatide(sodium salt) (CAS 2023788-19-2(free base))
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