AmberLite IRN9925 OH

Summary

Product identification

• Product Name: AmberLite™ IRN9725 OH Ion Exchange Resin
• Description: Nuclear-grade, Uniform Particle Size, Macroporous, Strong Base Anion Exchange Resin for Water Treatment Applications in the Nuclear Power Industry.
• Historical Reference: Previously sold as DOWEX™ MONOSPHERE™ MP-725A (OH) Ion Exchange Resin.

Description and Applications

AmberLite™ IRN9725 OH is designed for nuclear loops requiring high resin purity and stability, minimizing ionic and non-ionic contamination. It effectively removes radioactive colloidal material, particularly ¹¹⁰mAg and antimony. Its macroporous structure and uniform particle size enable fast kinetics, allowing operation at high linear velocities and low pressure drop. It is often used as an overlay in short beds above mixed beds or cation resins.

Applications include:

• Primary Water Treatment:
  • Primary coolant purification
  • Treatment of primary coolant blowdown
  • Pre-outage clean-up
• Fuel Pool:
  • Purification in single bed VVER systems

Purity

AmberLite™ IRN Ion Exchange Resins are manufactured to nuclear-grade standards with minimal inorganic and soluble organic impurities to prevent system contamination, deposits, and activation of impurities. They are recommended for both non-regenerable and regenerable single bed or mixed bed applications demanding high-quality water.

Typical Properties

Physical Properties

• Copolymer: Styrene-divinylbenzene
• Matrix: Macroporous
• Type: Strong base anion
• Functional Group: Trimethylammonium
• Physical Form: White, opaque, spherical beads

Chemical Properties

• Ionic Form as Shipped: OH⁻
• Total Exchange Capacity: ≥ 0.80 eq/L (OH⁻ form)
• Water Retention Capacity: 65.0 – 75.0% (OH⁻ form)
• Ionic Conversion:
  • OH⁻: ≥ 95%
  • CO₃²⁻: ≤ 5.0%
  • Cl⁻: ≤ 0.15%
  • SO₄²⁻: ≤ 0.10%

Particle Size

• Particle Diameter: 690 ± 50 µm
• Uniformity Coefficient: ≤ 1.10
• < 300 µm: ≤ 0.2%
• > 850 µm: ≤ 5.0%
• Note: For additional particle size information, refer to the Particle Size Distribution Cross Reference Chart (Form No. 45-D00954-en).

Purity (Metals, dry basis)

• Na: ≤ 25 mg/kg
• K: ≤ 40 mg/kg
• Fe: ≤ 50 mg/kg
• Cu: ≤ 30 mg/kg
• Ca: ≤ 10 mg/kg
• Mg: ≤ 10 mg/kg
• Al: ≤ 50 mg/kg
• Hg: ≤ 20 mg/kg
• Heavy Metals (as Pb): ≤ 10 mg/kg

Purity (Other, dry basis)

• SiO₂: ≤ 100 mg/kg

Stability

• Whole Uncracked Beads: ≥ 95%

Density

• Shipping Weight: 625 g/L

Suggested Operating Conditions

• Temperature Range (OH⁻ form): 5 – 100°C (41 – 212°F)
• pH Range (Stable): 0 – 14

Note: Operating at elevated temperatures (above 60–70°C) may impact loop purity and resin life. Consult a technical representative for details. For recommended minimum bed depth, operating, and regeneration conditions for mixed or separate beds, refer to the relevant Tech Facts documents.

Hydraulic Characteristics

Estimated bed expansion and pressure drop data as a function of backwash flowrate, service flowrate, and temperature are presented graphically in Figures 1 and 2, respectively. These pressure drop expectations are valid at the start of the service run with clean water.

Product Stewardship

DuPont is committed to product stewardship, assessing and managing the safety, health, and environmental aspects of its products throughout their lifecycle.

Customer Notice

Customers are encouraged to review their manufacturing processes and applications to ensure safe and intended use of DuPont products. Safety Data Sheets should be consulted prior to use.

WARNING: Oxidizing agents like nitric acid can react exothermically or cause degradation with ion exchange resins. Consult knowledgeable sources before using strong oxidizing agents.

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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