Bio-Rex® 70 Cation Exchange Resins

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Overview

Analytical Grade Resin Selection Guide
Analytical Grade Resin Selection Guide
Selecting Cation or Anion Exchange Support

Separation strategy for amphoteric molecules. If the molecule is stable at a pH above its pl, an anion exchange support is used. If the molecule is stable at a pH below its pl, a cation exchange support is used.

AG Resin Equivalent Diameters
Analytical Grade Resin Wet Mesh and Equivalent Diameters
Wet mesh (U.S. Standards) 16 20 40 50 80 100 140 200 270 325 400
Diameter, µm 1,180 850 425 300 180 150 106 75 53 45 38

Bio-Rex 70 resins are weak cation exchange resins that are used for the purification and fractionation of peptides, proteins, antibiotics, and other cationic molecules. Bio-Rex 70 resins contain carboxylic acid exchange groups on a macroreticular acrylic polymer lattice. The high porosity of the resins allows large protein molecules to penetrate the pores and have access to the exchange sites located throughout the matrix.

Bio-Rex 70 resins are available in both analytical and biotechnology grades. Analytical grade Bio-Rex 70 resin has been exhaustively sized, purified, and converted to make it suitable for accurate, reproducible analytical techniques. Biotechnology grade Bio-Rex 70 resin is an analytical grade resin that has been certified to contain less than 100 microorganisms per gram of resin.

Larger volumes and special packaging for industrial applications are available on request.

Bio-Rex 70 Resin

142-5822
500 g, cation exchange resin, sodium form, macroreticular, 20–50 dry mesh size, 300–1,180 µm wet bead size, >1,000,000 MW limit

List Price:   $936.00
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Bio-Rex 70 Resin

142-5832
500 g, cation exchange resin, sodium form, macroreticular, 50–100 dry mesh size, 150–300 µm wet bead size, >1,000,000 MW limit

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Bio-Rex 70 Resin

142-5842
500 g, cation exchange resin, sodium form, macroreticular, 100–200 dry mesh size, 75–150 µm wet bead size, >1,000,000 MW limit

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Bio-Rex 70 Resin

142-5852
500 g, cation exchange resin, sodium form, macroreticular, 200–400 dry mesh size, 45–75 µm wet bead size, >1,000,000 MW limit

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Bio-Rex 70 Resin

143-5832
100 g, biotechnology grade cation exchange resin, sodium form, macroreticular, 50–100 dry mesh size, 150–300 µm wet bead size, >1,000,000 MW limit

List Price:   $468.00
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Bio-Rex 70 Resin

143-5852
100 g, biotechnology grade cation exchange resin, sodium form, macroreticular, 200–400 dry mesh size, 45–75 µm wet bead size, >1,000,000 MW limit

List Price:   $468.00
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Number Description Options
LIT206 Instruction Manual, Bio-Rex Weakly Acidic Cation Exchange Resin, Rev B Click to download