HPLC Column Equivalent Finder

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HPLC Column Equivalent Finder

Cross-Reference USP Columns across Premium and Value Brands

1. Current Manufacturer -- Select Brand --

2. Column Name / Phase -- Select Column --

USP L-Code (Auto-Detected)

Target Length (mm) 50 mm 100 mm 150 mm 250 mm

Inner Diameter (mm) 2.1 mm (UPLC) 3.0 mm 4.6 mm (Standard)

Particle Size (µm) 1.7 µm 3.0 / 3.5 µm 5.0 µm 10.0 µm

Equivalent Columns Found

Manufacturer	Column Series	Description / Chemistry	USP Code	Target Dimensions

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Understanding USP Column Equivalence (USP <621>)

When a specific HPLC column used in a validated method is unavailable or discontinued, USP General Chapter <621> Chromatography allows the use of an "equivalent" column. The primary requirement is that the alternative column must share the same L-Classification (L-Code) and be capable of meeting System Suitability requirements.

Step 1

Identify Your Column: Select the manufacturer and specific column name you are currently using from the dropdowns above.

Step 2

Verify Dimensions: Ensure the Length, Diameter, and Particle size match your current method. While USP <621> allows some adjustments to dimensions for isocratic methods, sticking to the original specs minimizes re-validation work.

Step 3

Compare Alternatives: The tool lists equivalent columns from both premium global brands (like Waters, Agilent) and high-quality value manufacturers (like Welch, GL Sciences, Kromasil). This allows you to balance performance needs with budget constraints.

Common USP Codes

• L1 (C18): Octadecyl silane bonded to porous silica or ceramic microparticles.
• L7 (C8): Octyl silane bonded to totally porous silica particles.
• L11 (Phenyl): Phenyl groups bonded to porous silica particles.
• L3 (Silica): Porous silica particles (Normal Phase).