Chromalite CGA200x8Ac is a chromatographic anion exchange resin with a polymer designed for small organic and inorganic compound separation and purification. It contains 200 μm styrenic resin beads crosslinked with 8% divinylbenzene (DVB). Our proprietary manufacturing method creates perfectly spherical beads with exceptional kinetic and packing properties.

Unlike similar products on the market, Chromalite CGA and CGC resins are supplied in highly pure form (very low extractables content) and do not require pre-treatment. As such they are suitable for pharmaceutical applications.

Supplied in Acetate form.

Equivalent to:
- Dowex® 1X8 50-100 mesh (Dow)
- AG 1-X8 Resin (Bio-Rad)


CGA resins occasionally exhibit an amine odour after prolonged storage (this will not affect performance).

In such cases it is recommended to rinse the affected resin with sufficient volumes of water to remove the odour before putting the resin into service.

Principal Applications

  • Peptide salt exchange from trifluoroacetate to acetate form in SPPS
  • Ion exchange chromatography
  • Desalting of biomolecules after fermentation
  • Suitable for inorganic, organic and biological molecule separation


  • High chemical stability
  • High capacity
  • Large particle size optimal for large column packing
  • High purity
  • Exceptional kinetic and packing properties

Regulatory Approvals

  • Compliant with FDA regulation 21 CFR 173.25
  • Compliant with ResAP(2004) 3
  • Halal
  • Kosher
  • TSE/BSE/GMO free

Typical Packaging

  • 250 g
  • 1 kg

Typical Physical & Chemical Characteristics:

Appearance Pale yellow to dark yellow spherical beads
Functional Group Quaternary Ammonium
Supplied as Acetate form (Ac conversion >85%) in 20% EtOH solution
Volume capacity (min.) 1.2 eq/l
Weight capacity (min.) 3.5 eq/Kg
Particle size (90% in Range) 150 - 300 µm
Particle size (90% in the range) 50 - 100 mesh
Mean Diameter 200 - 250 µm
Uniformity Coefficient (max.) < 1.5
Total moisture 45 - 60 %
pH Limit Stability 1 - 14
Optimal storage condition 2 - 20 °C
Expiry date (from date of manufacture) 5 years
% Crosslinking 8