A400, Type 1 Porous Strong Base Anion Resin, Chorlide Form

Purolite® A400, Type 1 Porous Strong Base Anion Resin, Chloride Form is a clear gel Type 1 strong-base anion exchanger with both high operating capacity and the ability to achieve low residual silica levels. Minimal quantities of caustic soda are required compared with those typical of the classical Type 1 (A600) quaternary ammonium structure based on polystyrene. It has a clear gel structure, showing excellent regeneration efficiency and rinse characteristics. A400 functions well both in mixed bed and layered bed demineralizer systems, where specially tailored particle size ranges result in achieving or maintaining good separations. A400 has exceptional physical stability for a conventional gel-type resin which permits a long life without the development of excessive pressure drop; it also shows good kinetics of exchange, enabling very low concentration levels of both strong and weak acid anions to be achieved at practical flowrates.

Application - Regeneration Efficient Demineralization / Silica Removal
Polymer Structure - Gel polystyrene crosslinked with divinylbenzene
Appearance - Spherical beads
Functional Group - Type 1 Quaternary Ammonium
Ionic Form as Shipped - Cl-

Product Information



Total Capacity (min.)
1.3 eq/l (28.4 Kgr/ft3) (Cl- form)


Moisture Retention, Cl- Form
48 - 54 %


Particle Size Range
300 - 1200 µm


<300 µm (max.)
1 %


Uniformity Coefficient (max.)
1.7


Reversible Swelling, Cl- → OH- (max.)
20 %


Specific Gravity
1.08


Shipping Weight (approx.)
680 - 715 g/l (42.5 - 44.7 lb/ft3)


Temp Limit, Cl- Form
100°C (212°F)


Temp Limit, OH- Form
60°C (140°F)