Tetracosamethyl-cyclododecasiloxane CAS 18919-94-3

Purity 97%+In StockPharmaceutical Standards
CAS No.18919-94-3
Molecular FormulaC24H72O12Si12
Molecular Weight889.85 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Tetracosamethyl-cyclododecasiloxane CAS 18919-94-3 chemical structure

Description

The occurrence of Tetracosamethyl-cyclododecasiloxane 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.

Tetracosamethyl-cyclododecasiloxane (CAS 18919-94-3), molecular formula C24H72O12Si12 and molecular weight 889.85 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, Tetracosamethyl-cyclododecasiloxane (C24H72O12Si12) contains a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of -11.0, corresponding to approximately 0 ring(s) or double-bond equivalent(s). With a molecular weight of 889.85 g/mol, it falls into the high-molecular-weight range.

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 FormulaC24H72O12Si12
Molecular Weight889.85 g/mol
Purity97%+
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)-11.0
CAS Registry Year (est.)1962

Recommended Standards

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