1. Grade: BIO-42
2.Filtration Speed: Slow
3.Pore ​​sizes: 2.5μm
4.Disc: 55, 70, 90, 110, 125, 150, 180, 185, 240, 270mm, or OEM

Availability: In Stock

Description of No. 42 Filter Paper:

No. 42 filter paper is an ashless quantitative filter paper, which provides the finest particle retention among all Hawach filter papers, with a pore size of 2.5μm and a diameter of 55mm to 270mm. OEM is acceptable.

Features of  Hawach No. 42 Filter Paper:

  • Fine particle retention: 2.5μm
  • Flow rate: slow
  • ISO 9001, CE certification
  • No. 42 filter paper is often the most effective quantitative filter paper for collecting fine particles or fine precipitates, such as barium sulfate.
  • HAWACH produces No. 40 to No. 44 ashless quantitative filter papers with an ash content of <0.007%. They are very pure filter paper, including fast, medium, and slow rates, and are ideal for most major analytical filtration processes.

Application:

  1. Specific gravity analysis of precipitates such as barium sulfate, stannic acid, and finely precipitated calcium carbonate.
  2. Determination of acid content of minerals such as barium sulfate, metastannic acid, calcium carbonate, and strontium carbonate.
  3. Filter gasoline or organic solvents.
  4. Filter paper cups for spectroscopic and chromatographic samples, such as AAS determination of dibutyltin dilaurate in feed.

In addition, HAWACH also offers medium flow No. 40 filter paper to choose from.

Selection Guide for Filter Paper

filter paper selection

Grade Comparison

HawachWhatmanAdvantecMunktellAhlstromMacherey Nagel
BIO-42Grade 425C393/00H94640de

Technical Data

GradeParticle
Retention
Product
Appearance
Filtration
Speed
Ash Content
(%)
Basis Weight
(g/m2)
Wet Burst
(mm H2O)
BIO-422.5μmSmoothSlow<0.007104> 200

Ordering Information

Item #DescriptionNO.pore sizeflow ratediameterpack
BIO-42-055

Quantitative Filter Paper

Grade 422.5μmSlow55mm100pcs/pk
BIO-42-07070mm
BIO-42-09090mm
BIO-42-110110mm
BIO-42-125125mm
BIO-42-150150mm
BIO-42-180180mm
BIO-42-185185mm
BIO-42-240240mm
BIO-42-270270mm

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