Whatman 1541-125 Filter Circles, 125mm Dia, Hardened Ashless Grade 541, 100/pk (PN:1541-125)

Whatman Grade 541 filter papers are commonly used for quantitative and gravimetric analysis in laboratory environments. They are designed for rapid filtration of coarse particles and gelatinous precipitates, especially in chemical analysis procedures involving strong acids or alkaline solutions.

Grade 541 filter paper provides a nominal particle retention of about 22 µm, making it suitable for separating larger particles while maintaining a fast filtration speed. This balance allows efficient processing of samples that contain coarse solids or precipitates.

Hardened ashless filter paper is treated with acid during manufacturing to create high wet strength and extremely low ash content. This ensures minimal residue during combustion or gravimetric analysis, helping laboratories obtain more accurate analytical results.

Grade 541 filter paper is frequently used in food testing, environmental analysis, cement and mineral testing, and general analytical chemistry. Typical applications include determining fiber content in animal feed, analyzing gelatin in dairy products, and measuring chloride or phosphorus levels in industrial materials.

This grade is designed with a large pore structure and strong cellulose matrix, allowing liquids to pass through quickly while still capturing coarse particles. Its hardened surface also improves durability, making it suitable for demanding laboratory filtration procedures.