Octamethylcyclotetrasiloxane CAS 556-67-2

Purity >95%In StockPharmaceutical Standards
CAS No.556-67-2
Molecular FormulaC8H24O4Si4
Molecular Weight296.62 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Octamethylcyclotetrasiloxane CAS 556-67-2 chemical structure

Description

The occurrence of Octamethylcyclotetrasiloxane 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.

Octamethylcyclotetrasiloxane (CAS 556-67-2) is a high-purity analytical reference standard with the molecular formula C8H24O4Si4 and a molecular weight of 296.62 g/mol.

Octamethylcyclotetrasiloxane (C8H24O4Si4) contains a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.

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.

As a certified reference material (CRM), Octamethylcyclotetrasiloxane meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC8H24O4Si4
Molecular Weight296.62 g/mol
Purity>95%
StorageStore in a cool place (≤25°C), keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)-3.0
CAS Registry Year (est.)1957

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