Stearic Anhydride CAS 638-08-4

Purity >95%In StockPharmaceutical Standards
CAS No.638-08-4
Molecular FormulaC36H70O3
Molecular Weight550.94 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Stearic Anhydride CAS 638-08-4 chemical structure

Description

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, Stearic Anhydride is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 550.94 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

Stearic Anhydride (CAS 638-08-4) is a high-purity analytical reference standard with the molecular formula C36H70O3 and a molecular weight of 550.94 g/mol.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

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 FormulaC36H70O3
Molecular Weight550.94 g/mol
Purity>95%
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1957

Related Stearic Standards

Recommended Standards

Why CATO?