1,1,1,3,5,5,5-Heptamethyltrisiloxane CAS 1873-88-7

Purity >95%In StockPharmaceutical Standards
CAS No.1873-88-7
Molecular FormulaC7H22O2Si3
Molecular Weight222.50 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

1,1,1,3,5,5,5-Heptamethyltrisiloxane CAS 1873-88-7 chemical structure

Description

The occurrence of 1,1,1,3,5,5,5-Heptamethyltrisiloxane is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS 1873-88-7), a certified reference material (molecular formula C7H22O2Si3, MW 222.50 g/mol) for analytical method development and quality control.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, 1,1,1,3,5,5,5-Heptamethyltrisiloxane is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 222.50 g/mol — guide the selection of appropriate sample preparation and analytical techniques.

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.

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 FormulaC7H22O2Si3
Molecular Weight222.50 g/mol
Purity>95%
StorageStore at room temperature
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)-3.0
CAS Registry Year (est.)1957

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