1,1,3,5,5-Pentamethyl-3-phenyl-1lambda3,5lambda3-trisiloxane CAS 17962-34-4

Purity 97%+In StockPharmaceutical Standards
CAS No.17962-34-4
Molecular FormulaC11H20O2Si3
Molecular Weight268.53 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1,1,3,5,5-Pentamethyl-3-phenyl-1lambda3,5lambda3-trisiloxane CAS 17962-34-4 chemical structure

Description

CATO supplies 1,1,3,5,5-Pentamethyl-3-phenyl-1lambda3,5lambda3-trisiloxane (CAS 17962-34-4), a certified reference material (molecular formula C11H20O2Si3, MW 268.53 g/mol) for analytical method development and quality control.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, 1,1,3,5,5-Pentamethyl-3-phenyl-1lambda3,5lambda3-trisiloxane is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 268.53 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.

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 FormulaC11H20O2Si3
Molecular Weight268.53 g/mol
Purity97%+
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1962

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