Checkout using your account
Checkout as a new customer
Creating an account has many benefits:
Questions, MSDS, CoA?
Do you have any questions? Give us a call or send us an email!


The Ascentis Express ES-CyanoGuard cartridges 5x2.1mm, 2µm, are used for column protection of Ascentis Express ES-CyanoHPLC and UHPLC columns with an internal diameter of 2.1mm. The Ascentis Express Guard Cartridge Holder 53500-U serves as the housing.
Ascentis Express columns are based on fused-core or superficially porous particles. A solid core combined with a porous shell provides short diffusion paths and an efficient packing structure. As a result, high column numbers and narrow peaks can be achieved, often without reaching the backpressure associated with fully porous sub-2-µm particles. The platform includes classic reverse-phase columns, polar embedded phases, HILIC phases, and application-specific surface chemistries.
Ascentis Express is a registered trademark of the manufacturer Merck KGaA, Darmstadt, Germany.
| Brand | Ascentis Express |
|---|---|
| Product Type | (U)HPLC Guard Cartridges |
| Length | 5 mm |
| Internal Diameter | 2.1 mm |
| Particle Size | 2 µm |
| Chemistry | CN (Cyano, Nitril) |
| Chemistry Producers Term | ES-Cyano |
| Pore Size | 90 Å |
| USP Class | L10 |
| Carbon Load | 3.4 % |
| Bet Surface Area [m2/g] | 120.0 |
| Endcapping | endcapped |
| Country of Origin | Germany |
| Hardware Material | Stainless Steel |
| Hardware Type | Cartridges |
| pH Minimum | 1.0 |
| pH Maximum | 8.0 |
| Mode of Separation | Hydrophilic Interaction Chromatography (HILIC) |
| Technology | U(H)PLC |
| Matrix | Silica |
| Particle Morphology | spherical, solid core, porous shell |