HPLC Column, Zx Similars C8 Octyl, 3um, 4.0mm ID x 50mm Length, Cogent Brand. 1 EA. Special Order Item.
Additional Information:
Zx Similars C8™ Octyl is a traditional reversed-phase HPLC stationary phase manufactured on high-purity Type-B spherical silica with a fully endcapped octyl (C8) bonded phase. Designed as a cost-effective alternative to Agilent Zorbax® C8 columns, it offers comparable chromatographic behavior for USP L7 methods while providing the moderate hydrophobic retention, reproducibility, and reliability expected from a conventional C8 stationary phase. Compared to C18 columns, C8 phases generally provide reduced retention and faster elution of hydrophobic analytes.
65308-05P-4 is a 50 mm x 4.0 mm ID analytical column packed with 3 µm Zx Similars C8 particles. The short 50 mm length is optimized for rapid analyses, fast equilibration, and high-throughput workflows. The 3 µm particle size provides significantly higher efficiency and improved peak capacity than conventional 5 µm columns, while generating increased operating pressure that should be considered during method development. The 4.0 mm ID format is commonly selected for legacy methods and typically operates at approximately 0.8–1.5 mL/min.
This USP L7 column is ideal for hydrophobic and neutral compounds when less retention is desired than a comparable C18 phase. Common applications include pharmaceutical analysis, long-chain fatty acid separations, quality control testing, and fast analytical methods requiring chromatographic behavior similar to Agilent Zorbax® C8 columns. This product is supplied as a Special Order Item manufactured specifically upon receipt of order.
Key Benefits
Type-B spherical silica stationary phase
Suitable alternative for USP L7 methods
Comparable selectivity to Agilent Zorbax® C8 columns
Fast analysis with 50 mm column length
Higher efficiency than comparable 5 µm columns
Lower retention than C18 columns
Excellent for hydrophobic and neutral compounds
End-capped C8 bonded phase
Typical Applications
USP L7 methods
Reversed-phase HPLC
Pharmaceutical analysis
Quality control testing
Method development
Long-chain fatty acid analysis
Fast analytical separations
Method transfer and validation
Specifications
Product Type: HPLC Column
Stationary Phase: Zx Similars C8 Octyl
USP Classification: L7
Particle Size: 3 µm
Particle Type: Type-B Spherical Silica
Bonded Phase: C8 (Octyl)
Endcapped: Yes
Column Dimensions: 4.0 mm ID x 50 mm
Length: 50 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 reversed-phase chromatography
Short column length provides rapid analyses
Higher efficiency than comparable 5 µm columns
Increased operating pressure compared to larger particle sizes
Compatible with HPLC systems capable of handling elevated backpressure
Provides less retention than comparable C18 stationary phases
Special Order Item