HPLC Column, IEX WAX, 5um, 4.0mm ID x 250mm Length, 100A. Cogent Brand. 1 EA. Special Order Item.
Additional Information:
Cogent IEX WAX is a weak anion exchange (WAX) HPLC stationary phase designed for the retention and separation of negatively charged compounds. Manufactured using high-purity silica and diethylaminopropyl functional groups, the stationary phase provides a positively charged surface within its functional pH range, delivering reliable anion exchange selectivity for acidic compounds and other anionic analytes. This chemistry is widely used in ion exchange chromatography and serves as an excellent alternative for many USP L9 methods.
67590-25P-4 is a 250 mm x 4.0 mm ID analytical HPLC column packed with 5 µm WAX particles with a 100 Å pore size. The extended 250 mm column length provides maximum resolving power, increased theoretical plate counts, and enhanced separation of closely related compounds in demanding ion exchange applications. The 4.0 mm ID format is commonly selected for legacy methods and conventional HPLC systems and typically operates at approximately 0.8–1.5 mL/min, making it well suited for complex analyses, impurity profiling, and applications requiring superior chromatographic resolution.
This weak anion exchange column is particularly useful for the analysis and purification of organic acids, pharmaceuticals, biomolecules, and other negatively charged compounds. The combination of selective WAX functionality, high-purity silica, efficient 5 µm particles, and extended column length provides exceptional chromatographic performance for challenging anion exchange separations where maximum resolution is required. This product is supplied as a Special Order Item manufactured specifically upon receipt of order.
Key Benefits
Weak anion exchange (WAX) stationary phase
Diethylaminopropyl functional groups
Suitable for negatively charged analytes
Alternative for many USP L9 methods
High-purity silica support
5 µm particles for efficient separations
Maximum chromatographic resolution from 250 mm column length
Increased theoretical plate counts
Excellent reproducibility and ion exchange selectivity
Typical Applications
Ion exchange chromatography
Anion separations
Acidic compound analysis
Organic acid analysis
Pharmaceutical analysis
USP L9 methods
Impurity profiling
Method validation
Purification of negatively charged compounds
Complex sample separations
Specifications
Product Type: HPLC Column
Stationary Phase: IEX WAX
USP Classification: L9
Chromatography Mode: Weak Anion Exchange
Functional Group: Diethylaminopropyl
Particle Size: 5 µm
Pore Size: 100 Å
Column Dimensions: 4.0 mm ID x 250 mm
Length: 250 mm
Recommended Flow Rate: 0.8–1.5 mL/min
Brand: Cogent
Special Order Item Information
This item is a Special Order Item manufactured specifically to customer requirements.
Special Order Items cannot be canceled or returned once an order has been placed.
Manufactured upon receipt of order.
May have extended lead times compared to stocked products.
Important Notes
Designed for weak anion exchange chromatography
Retains negatively charged analytes
Functional charged range approximately pH 5–8
Suitable for many USP L9 applications
High-purity silica provides reliable chromatographic performance
Longer column length provides maximum chromatographic resolution
Ideal for impurity profiling and complex separations
Compatible with conventional HPLC systems
Special Order Item