Whatman™ Quantitative Filter Papers, Hardened Low Ash, Grade 54

The Whatman™ Grade 54 Quantitative Filter Papers are high-performance, hardened low ash cellulose filters specifically designed for fast vacuum filtration and recrystallization applications. Engineered with enhanced wet strength and chemical resistance, these filters are ideal for use in Büchner and Hirsch funnel filtration systems, where durability and rapid flow are critical.

With a fast filtration speed (Herzberg ~39 seconds) and coarse particle retention (~22 µm), Grade 54 filter papers enable efficient separation of coarse and gelatinous precipitates while minimizing fiber shedding—even under wet conditions. Their low ash content (≤0.015%) ensures reliable quantitative analysis with minimal residue interference.

Key Features

Optimized for Vacuum Filtration

• Designed for use with Büchner and Hirsch funnels
• Supports fast vacuum suction filtration
• Ideal for recrystallization and rapid separation workflows

Hardened for High Wet Strength

• Acid-treated for enhanced mechanical strength when wet
• Resists tearing and deformation during vacuum filtration
• Maintains structural integrity under demanding conditions

Fast Filtration Performance

• Herzberg filtration speed of approximately 39 seconds
• Enables rapid processing and improved laboratory efficiency

Coarse Particle Retention

• Nominal retention of ~22 µm
• Suitable for coarse and gelatinous precipitates
• Prevents clogging and supports high flow rates

Low Ash Content for Quantitative Analysis

• Maximum ash content of ≤0.015%
• Minimizes contamination during gravimetric analysis
• Ensures reliable and reproducible results

Low Fiber Shedding

• Hardened structure reduces fiber release
• Improves filtrate purity and protects downstream analysis

Applications

• Vacuum filtration using Büchner and Hirsch funnels
• Recrystallization processes in chemistry laboratories
• Filtration of coarse and gelatinous precipitates
• Quantitative gravimetric analysis
• Industrial and research laboratory filtration
• Sample preparation for chemical and materials analysis

Technical Specifications

Available Models and Ordering Information

Workflow Integration

Sample Preparation → Vacuum Filtration (Grade 54) → Collection of Precipitate → Drying / Analysis

This ensures:

• Rapid filtration under vacuum conditions
• Efficient collection of coarse precipitates
• Reliable results in quantitative and preparative workflows

Unique Advantages

• Specifically engineered for vacuum filtration systems
• High wet strength prevents tearing during suction filtration
• Fast filtration improves laboratory throughput
• Low ash content supports quantitative accuracy
• Reduced fiber shedding enhances filtrate purity
• Ideal for recrystallization and coarse precipitate handling

The Whatman™ Grade 54 Quantitative Filter Papers (Hardened Low Ash) are a robust and efficient solution for laboratories requiring fast, durable, and reliable filtration under vacuum conditions. With their high wet strength, rapid flow rate, and low ash content, they are particularly suited for recrystallization, coarse precipitate filtration, and quantitative analytical applications.