Process Separations — Specialty Beads

Bio-Rex Resins™

Family Members■■ Bio-Rex 5 Resin■■ Bio-Rex 70 Resin■■ 
Bio-Rex Reactor
Grade Resin

At a Glance
The Bio-Rex Resins are weak ion exchangers. They are available in various sizes to aid laboratory- to
manufacture-scale purifications.
Bio-Rex 5 Resins

Bio-Rex 70 Resins

FeaturesFeatures■■■■■■

Weak anion exchangers that contain mostly
tertiary and some quaternary amines
Exhaustively sized, purified, and converted tomake them suitable for accurate, reproducible
analytical techniques
Available in two dry mesh sizes (100–200 and200–400) with analytical grade purity

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Weak cation exchangers that contain mostly
tertiary and some quaternary amines
Functional group: carboxylic acid exchangegroups on a macroreticular acrylic polymer
lattice
Available in both analytical and biotechnology
grades– Analytical grade: exhaustively sized, purified,and converted to make it suitable foraccurate, reproducible analytical techniques

Bio-Rex 5 Technical Specifications+

Functional group

R-N (CH3)2C2H4OH

MatrixStyrene divinylbenzene

Crosslinkage

4%

Approx. MW exclusion

1,400

Operating stability/pH range<7/0–14

Min. wet capacity (meq/ml)

1.1

Applications

Nominal density0.7■■

Ionic form

Chloride

Applications■■■■

Have an affinity for organic acids that can beused to remove acids from sugars
Exchange anions such as iodide, bromide, andchloride with weak interactions– Biotechnology grade: analytical grade resinthat has been certified to contain less than
100 microorganisms per gram of resin
Purification and fractionation of peptides, proteins,antibiotics, and other cationic moleculesBio-Rex Reactor Grade Technical Specifications

Resin

Crosslinkage

Approx. MWExclusion

OperatingStability/pHRange

Min. Wet Capacity

Nominal Density

Ionic Forms

8 and 10%1,000

0–14/0–14

1.5 meq/ml

0.72 g/ml

H+ + OH

Bio-Rex MSZ 501(D) Resin
Type: Mixed bed
Functional group: R-SO3and R-CH2N+(CH3)3–Bio-Rex Reactor Grade Resin■■

Usage of Bio-Rex 5 Resin, bulletin LIT207
Usage of Bio-Rex 70 Resin, bulletin LIT206
Usage of Bio-Rex MSZ 501(D) Resin, bulletin LIT205

Contains a dye that changes from blue-green to gold when its
exchange capacity is exhausted

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

Applications■■

Additional Information

Uniform bead size, which minimizes pressure drops and increases
resin capacity; used for desalting water and other nonelectrolytes

Features■■–Bio-Rex RG 501-X8 and Bio-Rex MSZ 501(D) Resins used for
power plant deionization systems and large-scale cleanup ofmetals from wastewater

For technical/product support or to request a quote, email yourregional Bio-Rad representative or contact customer service at
1-800-4-BIORAD (1-800-424-6723).

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Visit bio-rad.com/web/BioRexBeads for more information anddownload our Process Resin Selection Guide (bulletin 6713) for
technical and ordering information.

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Life ScienceGroup

Bulletin 6907 Ver A

US/EG17-03120317

Sig 1216