4-Fluorobenzo[d]oxazole-2-sulfonyl chloride CAS 1804212-47-2
| CAS No. | 1804212-47-2 |
| Molecular Formula | C7H3ClFNO3S |
| Molecular Weight | 235.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Fluorobenzo[d]oxazole-2-sulfonyl chloride (CAS 1804212-47-2), molecular formula C7H3ClFNO3S and molecular weight 235.62 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H3ClFNO3S, 4-Fluorobenzo[d]oxazole-2-sulfonyl chloride contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 235.62 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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), 4-Fluorobenzo[d]oxazole-2-sulfonyl chloride 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 | C7H3ClFNO3S |
| Molecular Weight | 235.62 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; 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.) | 1995 |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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Recommended Standards
- Ethyl 6-chloro-2-(difluoromethyl)nicotinate (CAS 1707378-60-6)
- 2-(Chloromethyl)-4-(difluoromethyl)pyridine-3-acetic acid (CAS 1804444-45-8)
- 2-Amino-3-(4-chloro-3,5-difluorophenyl)propanoic acid (CAS 1706431-62-0)
- ETHYL 3-CHLORO-5-(DIFLUOROMETHYL)PICOLINATE (CAS 1804705-94-9)
- 2-(Aminomethyl)-3-chloro-4-(difluoromethyl)-5-(trifluoromethyl)pyridine (CAS 1806941-28-5)
- 2-(4-Fluorophenyl)-2-phenylacetonitrile (CAS 719-82-4)
- tert-Butyl 6-(bromomethyl)picolinate (CAS 1332367-16-4)
- Boc-D-Homocys(Trt)-OH (CAS 1301706-43-3)
- 1-(3-Chloro-2-methylphenyl)-5-oxopyrrolidine-3-carboxylic acid (CAS 63674-94-2)
- 1-[2-(difluoromethoxy)phenyl]pyrrolidin-3-amine (CAS 1096836-96-2)
- rac-(2S,3R)-2-(pyridin-3-yl)oxolan-3-amine dihydrochloride (CAS 2059917-90-5)
- rel-(3aR,6aR)-3a-(Hydroxymethyl)tetrahydro-1H,3H-thieno[3,4-c]furan-1-one 5,5-dioxide (CAS 2797182-54-6)
- Bortezomib Impurity 15 (CAS CATO-C4X-107215)
- Semaglutide impurity 260 (CAS CATO-C4X-2226260)
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