2-Ethyl-1,3-benzothiazole-6-carboxylic acid CAS 17142-85-7
| CAS No. | 17142-85-7 |
| Molecular Formula | C10H9NO2S |
| Molecular Weight | 207.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Ethyl-1,3-benzothiazole-6-carboxylic acid (CAS 17142-85-7), molecular formula C10H9NO2S and molecular weight 207.25 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-Ethyl-1,3-benzothiazole-6-carboxylic acid (C10H9NO2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 207.25 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C10H9NO2S |
| Molecular Weight | 207.25 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1961 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Ethyl Standards
- Ethyl Benzothiazole-5-carboxylate (CAS 103261-70-7)
- Ethyl Benzothiazole-2-carboxylate (CAS 32137-76-1)
- 1,2-benzothiazole-3-carbonyl chloride (CAS 145759-64-4)
- 1,3-Benzothiazole-2-carbonyl chloride 67748-61-2 benzo[d]thiazole-2-carbonyl chloride (CAS 67748-61-2)
- 2757-92-8 Benzothiazole, 2-(ethylthio)- 2-(Ethylthio)benzothiazole EINECS 220-418-9 Ethyl mercaptobenzthiazole Ethylcaptax 2-Ethylmercaptobenzothiazole NSC 45348 (CAS 2757-92-8)
- 7-methyl-1,3-benzothiazole-2-carboxylic acid (CAS 1188226-86-9)
- 4-methyl-1,3-benzothiazole-2-carboxylic acid (CAS 3507-47-9)
- 5-methyl-1,3-benzothiazole-2-carboxylic acid (CAS 3507-52-6)
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