Equisil Si is a bare silica HPLC column based on fully porous, high-purity silica, designed for normal-phase and adsorption chromatography. Its active silanol surface enables strong polar interactions such as hydrogen bonding and dipole-dipole retention, making it ideal for the separation of polar compounds, isomers, and neutral organics. Equisil Si delivers stable retention and high reproducibility for labs using non-polar eluents in classical chromatographic techniques.
Equisil Si offers robust polar retention and classical silica behavior – the ideal choice for normal-phase chromatography and adsorption-based separations.
Bare, unmodified silica (USP L3 classification)
Strong polar retention via free silanol groups
Ideal for normal-phase and adsorption chromatography
Compatible with non-polar solvents (e.g. hexane, ethyl acetate)
Available in 3 µm and 5 µm particle sizes
Separation of polar compounds, isomers, and lipids
Normal-phase workflows in pharmaceutical and natural product analysis
Adsorption-based sample preparation and dry-loading methods
Method development using classical chromatographic selectivity
| Particle Sizes |
|
|---|---|
| Pore Size | 120 Å |
| Surface Area | 180 m²/g |
| Phase/Modification | Si |
| Particle Type | |
| Separation Modes | |
| USP Code | |
| Endcapping | No |
| Carbonload | 0 % |
| pH Range | 2 to 8 |
| Phase | Material Number |
|---|---|
| Equisil Si, 3 µm | e23.00. |
| Equisil Si, 5 µm | e25.00. |