Click HERE to learn more about Cogent TYPE-C™ stationary phases.

Click HERE for Frequently Asked Questions (FAQ) about Bidentate C18.

Click HERE for Application Notes.

Our goal is to provide the best Customer Experience possible. If you cannot find what you are looking for, have any questions or would like to give us a suggestion please use any of the following ways to contact us directly. We would love to hear from you.

  • Call us: 8:30AM – 6:00PM EST 1-732-380-8900 and hit 0#

  • Fax to us: 1-910-769-9435

  • Email Customer Support

We are always ready to lend any support we can. Our experienced scientists and professionals are ready to assist you with any technical support questions. Every question is considered a good question and we will work with you on a solution as fast as possible.

  • Call us: 8:30AM – 6:00PM EST 1-732-380-8900 and hit 0#

  • Fax to us: 1-910-769-9435

  • Email Technical Support

Very unique C18 performance | Extremely hydrophobic | Use with 100% aqueous or non-polar solvents.

This phase is virtually indestructible due to the direct silicon-carbon bonds achieved when using our proprietary silica and bonding technologies. State of the art 4um or 2.2um high purity silica with a straight chain C18 hydrocarbon is bonded directly to the silica hydride surface with TWO (2) separate points of attachment for long column lifetimes even when using harsh HPLC conditions.

This column is the most stable, efficient and unique C18 column on the market and it can perform very well in reverse phase (RP), normal phase (ONP) or aqueous normal phase (ANP).

It requires less water for good retention of hydrophobic compounds, making gradient analysis so much easier. With no end capping, this phase can be used at very low pH without damage and is also much more stable when used with paired ion (PIC) reagents in RP.

Using this column in normal phase (NP) produces a very unusual mode of HPLC. Due to the lack of a water shell on all TYPE-C™ columns, it can separate water labile compounds without them degrading on column as occurs on regular Silica columns.

  • Click HERE to view specifications.

  • Click HERE for more information about TYPE-C columns.

  • Click HERE for "How to use" these C18 columns.

NOTE: Our technical support team strongly recommends that the Cogent column filter, included with each column, be used with all HPLC columns whenever possible. Click HERE for details.

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