4,4′-di-tert-butylbiphenyl CAS 1625-91-8

Purity 97%+In StockPharmaceutical Standards
CAS No.1625-91-8
Molecular FormulaC20H38
Molecular Weight278.52 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4,4′-di-tert-butylbiphenyl CAS 1625-91-8 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4,4′-di-tert-butylbiphenyl.

4,4′-di-tert-butylbiphenyl (CAS 1625-91-8), molecular formula C20H38 and molecular weight 278.52 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 4,4′-di-tert-butylbiphenyl (C20H38) contains an organic framework. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 278.52 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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 FormulaC20H38
Molecular Weight278.52 g/mol
Purity97%+
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1957

Recommended Standards

Why CATO?