[21]Crown-7-ether CAS 33089-36-0

Purity 97%+In StockPharmaceutical Standards
CAS No.33089-36-0
Molecular FormulaC14H28O7
Molecular Weight308.37 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

[21]Crown-7-ether CAS 33089-36-0 chemical structure

Description

Structurally, [21]Crown-7-ether (C14H28O7) contains a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 1.0, corresponding to approximately 1 ring(s) or double-bond equivalent(s). With a molecular weight of 308.37 g/mol, it falls into the moderately-high-molecular-weight range.

[21]Crown-7-ether (CAS 33089-36-0) is a high-purity analytical reference standard with the molecular formula C14H28O7 and a molecular weight of 308.37 g/mol.

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 FormulaC14H28O7
Molecular Weight308.37 g/mol
Purity97%+
StorageStore in a cool place (≤25°C), keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)1.0
CAS Registry Year (est.)1966

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