For procurement managers and R&D scientists in the chemical and water treatment industries, understanding the precise specifications of ion exchange resins is key to making informed purchasing decisions. The 001x7 Styrene-Divinylbenzene Strong Cation Exchange Resin is a cornerstone product known for its high capacity and robust performance. At NINGBO INNO PHARMCHEM, we aim to provide clarity on these critical details, enabling you to buy with confidence.

The '001x7' designation typically refers to a gel-type, strong acid cation exchange resin based on a crosslinked polystyrene-divinylbenzene matrix. This molecular architecture is fundamental to its functionality. The sulfonic acid functional groups (-SO3-) attached to the polymer matrix are responsible for the resin's strong affinity for cations. The 'x7' often signifies a specific degree of crosslinking, which impacts the resin's physical and chemical characteristics.

Let's delve into the key specifications that define the 001x7 resin:

  • Polymer Matrix: Crosslinked Polystyrene with Divinylbenzene. This provides a stable, insoluble framework.
  • Functional Groups: Sulfonic acid groups (R-SO3⁻). These are strongly acidic and readily dissociate, allowing for efficient cation exchange.
  • Physical Form and Appearance: Typically supplied as yellow to brownish-yellow beads. The granular form is standard for easy handling and column packing.
  • Ionic Form (as shipped): Often supplied in the sodium (Na+) form, ready for water softening applications. It can also be converted to the hydrogen (H+) form or other cationic forms as needed.
  • Total Capacity (Na+ form, wet, volumetric): A critical parameter, usually ≥1.9 eq/l. This high capacity means more ions can be exchanged per unit volume of resin, leading to longer service cycles and reduced regeneration frequency. This is a significant advantage for buyers seeking operational efficiency.
  • Moisture Retention (Na+ form): Typically 45-50%. This indicates the amount of water held within the resin beads, affecting density and handling.
  • Particle Size Range: Generally between 0.3mm to 1.2mm, with a maximum for particles <300 µm.
  • Uniformity Coefficient (max.): Usually 1.6, indicating a relatively uniform particle size distribution, which contributes to good hydraulic characteristics and prevents excessive fines.
  • Effective Size: Within the range of 0.4-0.7mm, further defining the particle characteristics for optimal bed performance.
  • Reversible Swelling: The resin exhibits controlled swelling during ion exchange cycles (e.g., 10% max. for Na+ → H+ conversion), which is important for maintaining bed integrity.
  • Shipping Weight (approx.): Approximately 770-870 g/l (moist).
  • Specific Gravity (moist, Na+ Form): Around 1.27.
  • Temperature Limit: Can withstand up to 120°C (250 °F) in the Na+ form and 100°C (212 °F) in the H+ form.
  • pH Range Stability: Stable across a broad pH range of 0-14, showcasing its versatility in various chemical environments.

Understanding these specifications allows formulators and process engineers to select the optimal resin for their specific needs, whether for water purification, chemical separation, or catalysis. As a reliable manufacturer and supplier based in China, NINGBO INNO PHARMCHEM is committed to providing products that meet these exacting standards. If you are looking to purchase high-capacity cation exchange resin, our 001x7 series offers exceptional value and performance. Contact us to discuss your requirements and secure a quote for your next chemical purchase.