7-Chlorobenzo[c]isoxazol-3(1H)-one CAS 1785505-32-9
| CAS No. | 1785505-32-9 |
| Molecular Formula | C7H4ClNO2 |
| Molecular Weight | 169.57 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 7-Chlorobenzo[c]isoxazol-3(1H)-one (CAS 1785505-32-9), a certified reference material (molecular formula C7H4ClNO2, MW 169.57 g/mol) for analytical method development and quality control.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 7-Chlorobenzo[c]isoxazol-3(1H)-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 169.57 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C7H4ClNO2 |
| Molecular Weight | 169.57 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chlorobenzo Standards
- 3-Chlorobenzo[d]isoxazol-7-ol (CAS 155645-24-2)
- 4-Chlorobenzo[c]isoxazol-3(1H)-one (CAS 1781106-73-7)
- 2-Chlorobenzo[d]oxazol-7-ol (CAS 1781434-25-0)
- 4-Chlorobenzo[d]isoxazol-3(2H)-one (CAS 178748-22-6)
- 6-Chlorobenzo[d]isoxazol-5-ol (CAS 184766-64-1)
- 2-Chlorobenzo[d]oxazol-4-ol (CAS 950644-37-8)
- 2-Chlorobenzo[d]oxazol-5-ol (CAS 950644-38-9)
- 2-Chlorobenzo[d]oxazol-6-ol (CAS 256519-02-5)
Recommended Standards
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- 5-chloro-2H-pyrazolo[3,4-b]pyrazin-3-amine (CAS 1823231-87-3)
- 6-Chlorofuro[3,4-c]pyridin-1(3H)-one (CAS 1823366-46-6)
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- (5-formylbenzo[b]thiophen-2-yl)boronic acid (CAS 1182272-63-4)
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