Purolite MB‑400 is a premium mixed‑bed ion‑exchange Di-resin designed for high‑purity deionising, demineralisation applications. Supplied as a 25 kg bag of spherical gel‑type resin beads, the MB‑400 offers exceptional performance in both regenerable and non‑regenerable systems. When installed at the recommended flow rate, this resin can achieve near‑complete removal of dissolved salts and achieve conductivity values as low as approximately 0.1 µS/cm. 

Ideal for industrial, laboratory, and high‑demand water systems, the MB‑400 ensures reliable, low‑maintenance demineralisation across a wide temperature and pH range.

• Key Features

• Mixed‑bed resin in a volumetric ratio of approximately 40 % strong acid cation / 60 % strong base anion. 

• Gel polystyrene beads cross‑linked with divinylbenzene for mechanical strength and stability.

• Particle size range of 300–1200 µm, with <1 % below 300 µm; Uniformity Coefficient ≤1.7.

• Moisture content (max) 65 %.

• Shipping weight approx. 705‑740 g/L.

• Wide temperature tolerance: up to 100 ºC for non‑regenerable bed, and up to 60 ºC for regenerable bed. 

✓ Benefits

• Provides extremely low residual conductivity and very high purity water – ideal for applications requiring ultra‑pure demineralised water.

• Suitable for use in regenerable cartridges or complete ion‑exchange systems, offering cost‑effective long‑term performance.

• Gel‑type resin structure offers strong mechanical durability and minimal breakdown under flow conditions.

• Broad chemical and pH resilience allows for use in demanding environments.

• Installed in correct systems, it reduces maintenance frequency and supports stable system performance.

Technical Specifications

• Product Name: Purolite MB‑400 Mixed Bed Di-Resin

• Bag Size: 25 kg

• Ionic Form (as shipped): H⁺/OH⁻ (Mixed Bed)

• Cation/Anion Ratio: 40/60 volumetric 

• Particle Size: 300–1200 µm, ≤1 % <300 µm

• Uniformity Coefficient: ≤1.7

• Total Capacity (minimum): Approx. 0.55 eq/L for regenerated bed. 

• Temperature Limits: Non‑regenerable bed 100 ºC; Regenerable bed 60 ºC (140 ºF)

• Shipping Weight Approx.: 705‑740 g/L

• Typical Applications: Deionising & Demineralisation, high‑purity water systems, cartridge use

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  What You Get

  1 × 25 kg bag of Purolite MB‑400 Mixed Bed Resin
  
  

   

Note on Shipping Costs:

Our system automatically calculates live delivery rates based on your location and the nearest H2O Warehouse distribution point to ensure the most cost‑effective delivery possible. We understand heavy items like resin bags can be costly to ship — but we don’t inflate product prices to offset delivery fees. This way, you always receive the best possible product pricing, with transparent shipping costs shown upfront.