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GreenSep 4-Ethyl Pyridine Prep LC Columns - 250 mm, 50 mm I.D., 10 μm

GreenSep 4-Ethyl Pyridine is an alternative to and provides different selectivity to GreenSep Ethyl Pyridine (2-ethyl pyridine). This endcapped stationary phase has proven superior to conventional stationary phases (such as diol and cyano phases) in the areas of separation selectivity, peak shape and loading capacity. GreenSep 4-Ethyl Pyridine can easily replace conventional stationary phases used in SFC while delivering superior performance. GreenSep 4-Ethyl Pyridine provides better separations for amines in comparison with the 4-Ethyl Pyridine II.

Part Number
Inner Diameter
Particle Size
List Price
Your Price
4.6 mm
5.0 µm
625.00 USD
20 mm
5.0 µm
3290.00 USD
30 mm
5.0 µm
5700.00 USD
50 mm
10.0 µm
12200.00 USD
50 mm
5.0 µm
16600.00 USD
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Many SFC separations have utilized “older normal phase HPLC types” of stationary phases such as unmodified silica, diol, amino and cyano. These phases are poorly adapted to SFC and present a number of limitations for SFC separations including low capacity, poor selectivity and poor peak shape. GreenSep stationary phases, on the other hand, have been specifically engineered for SFC separations, paying close attention to bonding coverage, density and all factors leading to high capacity phases which exhibit excellent selectivity and peak shape. Many of the GreenSep phases designed for basic and acidic compounds do NOT require mobile phase additives that are commonly required with other brands of phases. The GreenSep range features a variety of selectivities offering orthogonality. All of these materials are available in analytical and also semi-preparative (10 mm), and preparative (20 mm, 30 mm and 50 mm i.d.) dimensions. Additionally, comprehensive technical and method development assistance is offered. Shown below is a column selection guide for the development of a SFC separation with the GreenSep Pyridyl Amide being the go-to column of choice, followed by the other columns.

Features and Benefits:

  • Specifically designed for high performance SFC separations resulting in superior separation, selectivity, peak shape, and loading capacity compared to conventional normal-phase HPLC materials adapted for SFC
  • Highly efficient columns with superior reproducibility produced from our rigorous bonding procedures
  • Directly scalable from analytical to preparative on the same media to streamline purification and maximise operational efficiency
  • Many phases have been specifically engineered using functional group chemistry that don’t require mobile phase additives such as triethyl amine


Inner Diameter 50 mm
Length 250.0 mm
Particle Size 10.0 µm
Phase 4-Ethyl Pyridine