Cyclotrisiloxane, 2,2,4,4,6,6-hexamethyl-, polymer with (1,1-dimethylethyl)ethenylbenzene and (1-methylethenyl)benzene CAS 66836-92-8

Purity 97%+In StockPharmaceutical Standards
CAS No.66836-92-8
Molecular FormulaC6H18O3Si3
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Cyclotrisiloxane, 2,2,4,4,6,6-hexamethyl-, polymer with (1,1-dimethylethyl)ethenylbenzene and (1-methylethenyl)benzene CAS 66836-92-8 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 500.90 g/mol gives Cyclotrisiloxane, 2,2,4,4,6,6-hexamethyl-, polymer with (1,1-dimethylethyl)ethenylbenzene and (1-methylethenyl)benzene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Cyclotrisiloxane, 2,2,4,4,6,6-hexamethyl-, polymer with (1,1-dimethylethyl)ethenylbenzene and (1-methylethenyl)benzene (CAS 66836-92-8), a certified reference material (molecular formula C6H18O3Si3C12H16C9H10, MW 500.90 g/mol) for analytical method development and quality control.

Structurally, Cyclotrisiloxane, 2,2,4,4,6,6-hexamethyl-, polymer with (1,1-dimethylethyl)ethenylbenzene and (1-methylethenyl)benzene (C6H18O3Si3C12H16C9H10) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 500.90 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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 FormulaC6H18O3Si3 C12H16 C9H10
Molecular Weight500.90 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1976

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