3-Ethoxybenzo[d]isothiazole CAS 34263-64-4
| CAS No. | 34263-64-4 |
| Molecular Formula | C9H9NOS |
| Molecular Weight | 179.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Ethoxybenzo[d]isothiazole.
CATO supplies 3-Ethoxybenzo[d]isothiazole (CAS 34263-64-4), a certified reference material (molecular formula C9H9NOS, MW 179.24 g/mol) for analytical method development and quality control.
The molecular framework of 3-Ethoxybenzo[d]isothiazole (C9H9NOS) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), 3-Ethoxybenzo[d]isothiazole 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 | C9H9NOS |
| Molecular Weight | 179.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Ethoxybenzo Standards
- 6-Ethoxybenzo[d]thiazole, 97% (CAS 1247348-77-1)
- 6-Ethoxybenzo[d]isothiazole (CAS 147317-54-2)
- 3-Ethoxybenzo[d]isoxazol-6-ol (CAS 439085-76-4)
- 5-Ethoxybenzo[c][1,2,5]thiadiazole (CAS 1753-21-5)
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- 6-Ethoxybenzo[d]oxazol-2-amine (CAS 13895-09-5)
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- 6-Ethoxybenzo[c][1,2]oxaborol-1(3H)-ol (CAS 1268390-29-9)
Recommended Standards
- 3,5-Dimethyl-4-thiocyanatophenol (CAS 6074-30-2)
- 3-Ethylbenzo[d]thiazol-2(3H)-one (CAS 6468-14-0)
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- 3-Methoxybenzyl isothiocyanate (CAS 75272-77-4)
- Tert-butyl (s)-(1-(2-nitrophenyl)pyrrolidin-3-yl)carbamate (CAS 348165-32-2)
- (2-Iodoethyl)(methyl)amine hydroiodide (CAS 19754-75-7)
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- 5-Amino-4-cyclopropyl-4h-1,2,4-triazole-3-thiol (CAS 1000933-23-2)
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- 2-((3,5-Dichlorophenyl)amino)-1,3-thiazole-4-carboxylic acid (CAS 1176121-33-7)
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