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YMC-Pack C4

Separate Mixed Polarity Samples Quickly

YMC-Pack C4 (Butyl) columns are less hydrophobic than C8 or C18 packings, and generally utilize more aqueous eluents than either of these reversed phase column types. When compared to C8 and C18 columns using the same eluent, C4 columns show significantly shorter retention for non-polar compounds. Retention of polar compounds, however, is not significantly affected. Therefore, mixtures with a wide range of component polarity are best analyzed by YMC Butyl. This is because the butyl bonded phase gives shorter analysis times while still maintaining high resolution when compared to longer chain bonded chemistries.

Three Pore Sizes Accommodate All Biomolecules

YMC Butyl columns are available with three pore sizes to accommodate optimum separations of virtually any molecular weight compound.
The 120Å phase is used extensively with non-polar peptides which are too strongly retained on C8 and C18. The 200Å and 300Å pore butyl phase columns effectively resolve many classes of proteins and biopolymers. The wide pore butyl chemistry allows minimal distortion of tertiary conformation for large biomolecules and results in samples that are pure, concentrated and high in biological activity.


Particle size : 3µm, 5µm
Pore size : 120Å, 200Å
Carbon contents : 7%, 5%, 3%
Usable pH range : 2.0-7.5


  • Ideally suited for biological separations
  • High coverage monomeric bonding on perfectly spherical silica supports
  • Fully endcapped
  • Available in 120Å,200Å and 300Å pore size packings

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