Benzo[c]isoxazole-4-carbaldehyde CAS 107096-56-0
| CAS No. | 107096-56-0 |
| Molecular Formula | C8H5NO2 |
| Molecular Weight | 147.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Benzo[c]isoxazole-4-carbaldehyde (CAS 107096-56-0), molecular formula C8H5NO2 and molecular weight 147.13 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Benzo[c]isoxazole-4-carbaldehyde is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 147.13 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.
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 | C8H5NO2 |
| Molecular Weight | 147.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1987 |
| Nitrogen Atoms | 1 |
Related Benzo Standards
- Benzo[c]isoxazole-7-carbaldehyde (CAS 107096-60-6)
- Benzo[d]oxazole-7-carbaldehyde (CAS 1097180-23-8)
- 1H-Benzo[d][1,2,3]triazole-4-carbaldehyde (CAS 125873-34-9)
- Benzo[d]oxazole-4-carbaldehyde (CAS 1492303-37-3)
- Benzo[d][1,3]dioxole-4-carbonitrile (CAS 161886-19-7)
- 4H-Benzo[d][1,3]oxazin-4-one (CAS 19555-60-3)
- Benzo[c]isoxazole-3-carbaldehyde (CAS 74052-97-4)
- Benzo[d]isoxazole-3-carbaldehyde (CAS 84395-93-7)
Recommended Standards
- 3-(1,2,4-Oxadiazol-3-yl)pyridine (CAS 10550-16-0)
- Pyrido[2,3-b]pyrazin-7-ol (CAS 1023815-30-6)
- Carbonic acid ethyl ester formylaminomethyl ester (CAS 1089330-78-8)
- 3H-Imidazo[4,5-b]pyridine-7-carbaldehyde (CAS 1023813-07-1)
- (2R,3R)-3-((tert-Butoxycarbonyl)amino)-2-methyl-3-phenylpropanoic acid (CAS 1217456-02-4)
- 2-[(1E)-1-[2-(Quinolin-8-yl)hydrazin-1-ylidene]ethyl]phenol (CAS 1429221-05-5)
- (3R,4S)-4-(6-methoxypyridin-3-yl)pyrrolidine-3-carboxylic acid (CAS 1392266-65-7)
- (Z)-(E)-Hex-2-en-1-yl hex-3-enoate (CAS 153367-21-6)
- [1-Methyl-5-(phenylsulfanyl)-3-(trifluoromethyl)-1H-pyrazol-4-yl]methyl N-(4-chlorophenyl)carbamate (CAS 318239-63-3)
- Di-n-butyl Phthalate-d22 (CAS 358731-15-4)
- Thiocolchicoside Impurity 1 (CAS 87424-25-7)
- 3-tert-Butyl-4-nitro-1H-pyrazol-5-ol (CAS 873920-66-2)
- (2S)-2-Amino-3-{[(tert-butoxy)carbonyl]amino}propanoic acid hydrochloride (CAS 1820572-31-3)
- D-Lys20-Tirzepatide (CAS CATO-CPTD788914)
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