LEWATIT® MDS 1269 K / 290

Summary

Product identification

Lewatit® MDS 1269 K 290 is a food grade, gel-type, monodisperse, strongly acidic cation exchange resin. It is based on a styrene-divinylbenzene copolymer.

This product is manufactured using a 1,2-dichloroethane-free production process.

Operating limits

• Stability pH range: 5-14
• Stability temperature range: 1-120 °C
• Operating temperature (max.): 120 °C
• Operating pH range during exhaustion: 0-14

Feed water

Startup recommendations are to be observed if using for the treatment of drinking water and certain aqueous solutions.

Product water

Not specified.

Electrical

Not specified.

Mechanical / hydraulic

• Uniformity coefficient (max.): 1.15
• Mean bead size (d50): 0.26 - 0.32 mm
• Total capacity (H⁺ form) (min.): 1.5 eq/L
• Bulk density for shipment (+/- 10%): 830 g/L
• Density (approx.): 1.3 g/mL
• Water retention (H⁺ form) (approx.): 55 - 67 weight %
• Bed depth for single column (min.): 800 mm
• Backwash bed expansion (per m/h at 20°C): 15 %
• Specific pressure loss (at 15°C): 7 kPa*h/m²
• Max. pressure loss during operation: 200 kPa

Storage and Handling

• Storage temperature range: -20 - +40 °C
• Recommended storage: Above freezing point of water, under roof, in dry conditions, without direct sunlight.
• Storage time (after delivery) (min.): 0.5 years
• Packaging stability: Limited to 24 months under recommended storage conditions.

Additional Information & Regulations

• Safety precautions: Strong oxidants (e.g., nitric acid) can cause violent reactions with ion exchange resins.
• Toxicity: Consult the safety data sheet.
• Disposal: Dispose of according to European waste nomenclature.

---

Disclaimer: Extraction may miss figures, footnotes, or revisions; contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror