Tos-PEG4-t-butyl ester CAS 217817-01-1

Purity 97%+In StockPharmaceutical Standards
CAS No.217817-01-1
Molecular FormulaC20H32O8S
Molecular Weight432.53 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Tos-PEG4-t-butyl ester CAS 217817-01-1 chemical structure

Description

CATO supplies Tos-PEG4-t-butyl ester (CAS 217817-01-1), a certified reference material (molecular formula C20H32O8S, MW 432.53 g/mol) for analytical method development and quality control.

The molecular framework of Tos-PEG4-t-butyl ester (C20H32O8S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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), Tos-PEG4-t-butyl ester 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 FormulaC20H32O8S
Molecular Weight432.53 g/mol
Purity97%+
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2019
Sulfur Atoms1

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