Whatman 1004-042 Qualitative Filter Paper Grade 4 42.5mm Pack of 100

Description

Product Overview

The Whatman 1004-042 Qualitative Filter Paper is engineered for laboratory environments where speed, consistency, and reliability are paramount. Manufactured by GE Healthcare Bio Sciences, this Grade 4 filter paper offers a balance of rapid flow and adequate retention of fine particles, making it suitable for a wide range of qualitative analyses. Each sheet is a perfect 42.5 mm circle, providing a standardized size that fits most standard laboratory filtration apparatus, including Buchner funnels, vacuum filtration setups, and gravity filtration devices. The pack contains 100 sheets, ensuring that laboratories have a sufficient supply for daily workflows, method development, and routine quality control. The paper is made from high‑purity cellulose fibers, guaranteeing low background interference and chemical inertness, which is essential when working with sensitive reagents or when downstream analytical techniques demand minimal contamination.

Usage

Designed for versatility, the Whatman Grade 4 filter paper excels in applications such as precipitation reactions, gravimetric determinations, and sample clarification prior to spectroscopic or chromatographic analysis. Its fast filtration rate reduces processing time, allowing technicians to increase throughput without sacrificing data quality. The circular format simplifies handling and placement, reducing the risk of misalignment that can cause uneven flow or filter tearing. Whether used in academic research labs, industrial quality‑control facilities, or teaching laboratories, this filter paper supports both routine and specialized protocols. The paper’s compatibility with a range of solvents—including water, dilute acids, and organic mixtures—makes it a go‑to choice for diverse chemical environments. Users can confidently employ the 100‑sheet pack for repeated experiments, method validation, and large‑scale sample processing.

Why Choose Us

Choosing the Whatman 1004-042 filter paper means selecting a product backed by decades of scientific expertise and rigorous quality assurance. Each batch undergoes strict testing for flow rate consistency, particle retention efficiency, and chemical compatibility, ensuring that the performance you experience is reproducible across every sheet. The paper’s cellulose composition is sourced from sustainably managed forests, aligning with environmental responsibility while delivering the purity required for high‑sensitivity assays. In addition, GE Healthcare Bio Sciences provides comprehensive technical support, offering guidance on method development, troubleshooting, and optimization. Our commitment to customer satisfaction includes a responsive after‑sales service that addresses any concerns promptly, reinforcing confidence in the reliability of the product throughout its lifecycle.

Key Features

• Fast filtration rate reduces analysis time and increases laboratory productivity
• Standard 42.5 mm circular size fits most filtration devices for easy handling
• High‑purity cellulose material minimizes background interference in sensitive assays
• Consistent flow and particle retention across all 100 sheets ensures reproducible results
• Dedicated technical support and reliable after‑sales service for seamless laboratory operation

FAQ

What types of samples can be filtered with this Grade 4 paper?

The Grade 4 paper is suitable for a broad range of aqueous and organic samples, including precipitates, suspensions, and solutions that require rapid flow while retaining fine particles. It works well with water, dilute acids, and many organic solvents commonly used in laboratory protocols.

Can the filter paper be used with vacuum filtration equipment?

Yes, the 42.5 mm circular sheets are designed to fit standard Buchner funnels and other vacuum filtration apparatus. Their sturdy cellulose structure tolerates the pressure differentials typical of vacuum filtration without tearing.

How does the performance of this filter paper compare to other grades?

Grade 4 offers a balance between speed and retention, providing faster flow than higher‑grade (e.g., Grade 5) papers while still capturing fine particulates effectively. It is ideal for routine qualitative work where speed is a priority but some particle retention is still required.

Is the filter paper compatible with acidic or basic solutions?

The cellulose fibers are chemically inert to most dilute acids and bases, making the paper suitable for a wide pH range. For highly corrosive or strong alkaline solutions, it is recommended to verify compatibility with a small test sample.

What is the recommended storage condition for the filter paper?

Store the filter paper in a cool, dry place away from direct sunlight and moisture. Keeping the pack sealed until use helps maintain the paper’s integrity and performance over time.