1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane CAS 17955-88-3

Purity 97%+In StockPharmaceutical Standards
CAS No.17955-88-3
Molecular FormulaC15H38O2Si3
Molecular Weight334.72 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane CAS 17955-88-3 chemical structure

Description

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.

1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane (CAS 17955-88-3) is a high-purity analytical reference standard with the molecular formula C15H38O2Si3 and a molecular weight of 334.72 g/mol.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 334.72 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.

CATO manufactures 1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

Molecular FormulaC15H38O2Si3
Molecular Weight334.72 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)-3.0
CAS Registry Year (est.)1962

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