Tri-o-tolylsilyl stearate CAS 18857-55-1

Purity 97%+In StockPharmaceutical Standards
CAS No.18857-55-1
Molecular FormulaC39H56O2Si
Molecular Weight584.95 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Tri-o-tolylsilyl stearate CAS 18857-55-1 chemical structure

Description

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.

Tri-o-tolylsilyl stearate (CAS 18857-55-1) is a high-purity analytical reference standard with the molecular formula C39H56O2Si and a molecular weight of 584.95 g/mol.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Tri-o-tolylsilyl stearate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 584.95 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

Physical & Chemical Properties

Molecular FormulaC39H56O2Si
Molecular Weight584.95 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at room temperature, protect from light
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)12.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1962

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