1,1,1,3,5,5,5-Heptamethyl-3-octadecyltrisiloxane CAS 167160-55-6

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1,1,1,3,5,5,5-Heptamethyl-3-octadecyltrisiloxane.

1,1,1,3,5,5,5-Heptamethyl-3-octadecyltrisiloxane (CAS 167160-55-6), molecular formula C25H58O2Si3 and molecular weight 474.98 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C25H58O2Si3, 1,1,1,3,5,5,5-Heptamethyl-3-octadecyltrisiloxane contains a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 474.98 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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

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