2,1-Benzisoxazole-3-carboxylic acid CAS 642-91-1

Purity 97%+In StockPharmaceutical Standards
CAS No.642-91-1
Molecular FormulaC8H5NO3
Molecular Weight163.13 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2,1-Benzisoxazole-3-carboxylic acid CAS 642-91-1 chemical structure

Description

2,1-Benzisoxazole-3-carboxylic acid (CAS 642-91-1) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C8H5NO3. Molecular weight: 163.13 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.

Physical & Chemical Properties

Molecular FormulaC8H5NO3
Molecular Weight163.13 g/mol
AppearanceOff-white to pale yellow crystalline powder. (faint amine-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)7.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Nitrogen Atoms1

Related Benzisoxazole Standards

Recommended Standards

Why CATO?