For a wide range of laboratory applications; also clarifying liquids, gas filtration, air pollution analysis and soil analysis. Download Whatman Grade No. 1 Filter Paper pricing: Click Here     

Silicone impregnated paper functions as a rapid phase separator in place of conventional separatory funnels. Paper retains aqueous phase and passes through hydrophobic phase. Download Whatman No. 1 PS Water Repellent Phase Separating Paper pricing: Click Here     

9

11

12.5

15

18.5

24

Specially made for chromatography. White, smooth, normally-hard surface. Recommended for general purpose chromatography uses. In sheets and rolls. Download Whatman No. 1 Chr Thin Chromatography Cellulose Paper pricing: Click Here   

Somewhat more retentive, slower and more absorbent than Grade No.1. For general-purpose lab applications, monitoring specific contaminants in the atmosphere, and soil testing. Download Whatman Grade No. 2 Filter Paper pricing: Click Here   

Diameter, cm

4.25

5.5

7

9

11

12.5

15

18.5

24

32

38.5

50

Slightly grained surface. Moderately thick. Highly absorbent. Highly suitable for use in Buchner funnels. Download Whatman Grade No. 3 Filter Paper pricing: Click Here     

Diameter, cm

5.5

7

9

11

12.5

15

18.5

24

For rapid filtering with excellent retention of coarse particles and gelatinous precipitates. Good rapid filter for routine cleanup of biological fluids or organic extracts during analysis. Also for air pollution monitoring where high flow rates are required. Download Whatman Grade No. 4 Filter Paper pricing: Click Here     

Very useful in clarification of cloudy solutions. Widely used in water analysis. Download Whatman Grade No. 5 Filter Paper pricing: Click Here

Diameter, cm

2.5

5.5

7

9

11

12.5

15

18.5

24

32

For analytical procedures involving coarse particles or gelatinous precipitates. Useful for iron or aluminum hydroxides. Also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates. Download Whatman Grade No. 41 Quantitative Ashless Filter Paper pricing: Click Here

Ashless paper for gravimetric analysis with very fine particle retention. A thinner paper than Grade No. 42, with lower ash weight per sample and almost twice the flow rate. Download Whatman Grade No. 44 Quantitative Ashless Filter Paper pricing: Click Here     

Thin, smooth, hardened, low ash paper with high wet strength. Retains the finest crystalline precipitates. Highly suitable for qualitative or quantitative filtrations requiring vacuum assistance on Buchner or 3-piece filter funnels. Withstands wet handling and precipitate removal by scraping. Download Whatman Grade No. 50 Quantitative Low Ash Filter Paper pricing: Click Here

Hardened, low ash paper recommended for gelatinous precipitates and coarse particles. High wet strength makes this grade suitable for vacuum assisted fast filtration of “difficult” coarse or gelatinous precipitates. Download Whatman Grade No. 54 Quantitative Low Ash Filter Paper pricing: Click Here

Inert cotton linter, black dyed filter paper is designed for detection of light-colored precipitates. Also used in food laboratories and in determination of impurities in gases.  Download Whatman Grade 551 Special-Purpose Filter Paper pricing: Click Here  

Ashless, rough paper ideal for air monitoring, metallurgical analysis, as well as chromatography of compounds with Rf values that are well separated. Download Whatman Grade No. 589 Black Ribbon Quantitative Filter Paper pricing: Click Here

A smooth-surfaced wood pulp paper. This moderately high wet-strength student grade paper is recommended for general non-critical filtrations. Download Whatman General-Purpose Grade 595 and 995 Filter Paper pricing: Click Here

A creped wood pulp paper. This thin, hardened, high wet-strength paper is resistant to weak acids and alkalis; recommended for general and high-volume process filtration. Download Whatman Sharkskin General-Purpose Filter Paper pricing: Click Here