Fine Mesh Resins

For the highest levels of selectivity, consistency, and relability in column separations, there is no better choice than DOWEX™ spherical fine mesh ion exchange resins. DOWEX fine mesh resins are produced by selectively controlling the suspension polymerization technology we use to produce our standard 16 - 50 mesh industrial resins. The resulting resins consist of whole, spherical beads that provide excellent kinetic and packing properties in chromatographic separations...without the problems associated with ground or granular resins.

Dow offers a wide range of fine mesh resins for use in fine chemical and pharmaceutical column separations. Anion and cation resins with mesh sizes including 50 - 100, 100 - 200, and 200 - 400 are available. Cross-linkages (as measured by percent divinylbenzene content) include 2, 4, and 8. This broad product line permits selection of a resin offering the optimum levels of permeability, water retention capacity and total capacity for your particular application.

Dow's range of resin options not only enhances your ability to optimize laboratory separations, but also simplifies the adjustments that are often necessary during process scale-ups. This can help ensure that your success in the lab translates into success in pilot-scale as well as full-scale plant operations.

DOWEX fine mesh resins are durable, pH tolerant, clean, and predictable separations media that perform consistently and reliably in fine chemical and pharmaceutical column separations.

DOWEX Fine Mesh Resins

Product	Description	Type	Matrix	Total Exchange Capacity* eq/l (kgr/ft3)	Available Forms
DOWEX 1X2	Fine mesh resin for fine chemical and pharmaceutical column separations.	Fine Mesh	Styrene-DVB, Gel	0.6 meq/mL	Cl-
DOWEX 1X4	Fine mesh resin for fine chemical and pharmaceutical column separations.	Fine Mesh	Styrene-DVB, Gel	1.0 meq/ml	Cl-
DOWEX 1X8	Fine mesh resin for fine chemical and pharmaceutical column separations.	Fine Mesh	Styrene-DVB, Gel	1.2 meq/ml	Cl-
DOWEX 50WX2	Fine mesh resin for fine chemical and pharmaceutical separations.	Fine Mesh	Styrene-DVB, Gel	0.6 meq/ml	H+
DOWEX 50WX4	Fine mesh resin for fine chemical and pharmaceutical column separations.	Fine Mesh	Styrene-DVB, Gel	1.1 meq/ml	H+
DOWEX 50WX8	Fine mesh resin for fine chemical and pharmaceutical column separation.	Fine Mesh	Styrene-DVB, Gel	1.7 meq/ml	H+
DOWEX Retardion 11A8 50 - 100 mesh	Amphoteric resin containing both weak acid cation and strong base anion functionality within the same resin.	Amphoteric resin	Styrene-DVB, Gel	1.1 meq/ml (24.1 kgr/ft3) 1.2 meq/ml (26.3 (kgr/ft3)	-COOH and -N(CH3)3

Suggested Reading: F. J. Dechow, "Separation and Purification Techniques in Biotechnology," Noyes Publication, 1989 D. J. Gisch, "Genetic Engineering News" 2001, Volume 21, February, page 48-51.