CUSTOM ITEM: HPLC Column, Bidentate C8, 4um, 3.0mm ID x 150mm Length, 100A. Cogent TYPE-C Brand. 1 EA.
Additional Info:
The 40008‑15P‑3 Cogent Bidentate C8™ HPLC Column is a custom‑manufactured, long‑format mid‑bore analytical column designed to deliver maximum resolving power with reduced solvent consumption compared to standard 4.6 mm ID formats. Built on Cogent TYPE‑C™ silica hydride technology, this column offers excellent selectivity, faster equilibration, and extremely robust column lifetime for demanding analytical separations.
The stationary phase consists of an aliphatic C8 hydrocarbon chain bonded via two direct silicon–carbon bonds (bidentate attachment) to a silica hydride surface. This non‑traditional chemistry produces a phase that is more hydrophobic than conventional C8 columns, yet less hydrophobic than Bidentate C18™, providing a balanced option when C18 retention is excessive but stronger interaction than standard C8 is still required. Unlike traditional silica‑based C8 phases, this column can also retain select hydrophilic compounds, expanding the method‑development window.
The combination of 3.0 mm internal diameter and 150 mm length provides resolution comparable to longer 4.6 mm ID columns, while operating at lower flow rates, resulting in significant mobile‑phase savings. Importantly, these benefits are achieved without requiring specialized low‑flow instrumentation, making this format easy to integrate into standard analytical HPLC systems.
The column is also stable at very low pH (below pH 2) with no degradation, enabling aggressive analytical methods that are not suitable for conventional silica‑based C8 columns.
Why Choose the 3.0 × 150 mm Bidentate C8™ Format
This configuration is typically selected when:
Maximum analytical resolution is required
100 mm columns do not fully resolve critical pairs
C18 provides excessive retention or long run times
Solvent‑use reduction is desired without changing instrumentation
The 150 mm length increases plate count and separation efficiency, while the 3.0 mm ID reduces solvent consumption—delivering an optimal balance of performance and operating cost.
Key Features
Cogent TYPE‑C™ Silica Hydride Technology
Non‑traditional reversed‑phase surface chemistry
Reduced silanol activity and secondary interactions
Faster equilibration than conventional silica‑based C8 columns
Extremely robust and reproducible performance
Bidentate C8™ Bonding
Two‑point attachment via direct Si–C bonds
Balanced hydrophobic retention
Alternative selectivity when C18 is overly retentive
Maximum‑Resolution Mid‑Bore Geometry
3.0 mm ID × 150 mm length
High plate count for demanding separations
Lower solvent consumption vs. 4.6 mm ID columns
Broad Method Compatibility
Stable at very low pH (below 2)
Compatible with aqueous‑rich mobile phases
Suitable for aggressive and unconventional analytical methods
Typical Applications
High‑resolution analytical HPLC
Situations where C18 retention is excessive
Alternative reversed‑phase selectivity
Method development and optimization
Low‑pH analytical methods
Solvent‑reduction and cost‑efficiency initiatives
Made‑to‑Order & Pricing Information
This is a custom, made‑to‑order item.
Orders cannot be canceled once placed
Custom items are non‑returnable