Click HERE for Frequently Asked Questions (FAQ) about TYPE-C columns.


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


Liquid Crystal | Shape Recognition | "Steroids" Column | TYPE-C™ Silica

These columns have an eleven carbon (C11), aliphatic linker to a terminal cholesterol group bonded with a direct silicon-carbon bond to the silica hydride surface. It is one of our most unique HPLC columns.

The many advanced features of the Cogent UDC - Cholesterol ™ stationary phase produces a very stable and efficient HPLC column that operates in Reversed Phase (RP), Normal Phase (NP) and/or Aqueous Normal Phase (ANP) and will solve many difficult separation problems for you.

This phase is more sensitive to temperature and solvent composition than most phases due to the liquid crystal nature of the cholesterol moiety. These parameters are used in shape recognition and can make for very unique selectivity on this very stable and robust column. It is often used to separate steroids from each other.

  • Click HERE to view Specifications.

  • Click HERE for more Information About TYPE-C Columns.

  • Click HERE for "How to Use" UDC - Cholesterol 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 Filter details.

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