LEWATIT® MDS 1268 K / 290

Summary

Product identification

Lewatit® MDS 1268 K 290 is a food grade, gel-type, monodisperse, strongly acidic cation exchange resin based on a styrene-divinylbenzene copolymer. It is particularly suitable for chromatographic separations, such as the ion exclusion of molasses.

Specified Data

• Common Description: K⁺
• Functional group: Sulfonic acid
• Matrix: Styrenic
• Structure: Gel
• Appearance: Light brown, transparent
• Uniformity coefficient: max. 1.15
• Mean bead size (d₅₀): 0.26 - 0.32 mm
• Total capacity (H⁺ form): min. 1.5 eq/L

Typical Physical and Chemical Properties

• Bulk density for shipment: 830 g/L (+/- 10%)
• Density: approx. 1.3 g/mL
• Water retention (H⁺ form): approx. 55-67 % by weight
• Stability pH range: 5-14
• Stability temperature range: 1-120 °C
• Storage time (after delivery): min. 0.5 years
• Storage temperature range: -20 - +40 °C

Operation

• Operating temperature: max. 120 °C
• Operating pH range during exhaustion: 0-14
• Bed depth for single column: min. 800 mm
• Backwash bed expansion per m/h (20°C): 15 %
• Specific pressure loss (15°C): 6.55 kPa*h/m²
• Max. pressure loss during operation: 200 kPa

Additional Information & Regulations

• Safety precautions: Strong oxidants, e.g. nitric acid, can cause violent reactions if they come into contact with ion exchange resins.
• Toxicity: The safety data sheet must be observed.
• Disposal: Ion exchange resins have to be disposed of according to the European waste nomenclature.
• Storage: Recommended to store above the freezing point of water, under roof, in dry conditions without direct sunlight. If frozen, allow to thaw gradually at ambient temperature.
• Packaging: Packaging stability is limited to 24 months under recommended storage conditions.

Disclaimer: This 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