Filter Paper – Quantitative Grades

whatmanlogoCircles – Quantitative Grades

WET STRENGTH

L – Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of paper

M – Will withstand all normal use on Buchner Funnels or others devices under suction or moderate pressure

H – High wet strength and high chemical resistance

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Ashless

40

General purpose gravimetric paper

Medium

8

L

0.20

0.01

filter-paper-quantitative-grade-40

CAT NO

DIAMETER SIZE

PACK SIZE

1440-012

1.27cm

400

1440-032

3.2cm

100

1440-042

4.25cm

100

1440-047

4.7cm

100

1440-055

5.5cm

100

1440-070

7cm

100

1440-090

9cm

100

1440-110

11cm

100

1440-125

12.5cm

100

1440-150

15cm

100

1440-185

18.5cm

100

1440-240

24cm

100

1440-320

32cm

100

1440-6168

45cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Ashless

41

For filtration of coarse and gelatinous precipitates

Medium

8

L

0.20

0.01%

filter-paper-quantitative-grade-41

CAT NO

DIAMETER SIZE

PACK SIZE

1441-025

2.5cm

100

1441-040

4.05cm

100

1441-042

4.25cm

100

1441-047

4.7cm

100

1441-050

5cm

100

1441-055

5.5cm

100

1441-060

6cm

100

1441-070

7cm

100

1441-090

9cm

100

1441-105

10.5cm

100

1441-110

11cm

100

1441-125

12.5cm

100

1441-150

15cm

100

1441-185

18.5cm

100

1441-240

24cm

100

1441-320

32cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Ashless

42

Highly retentive for fine precipitates

Slow

2.5

L

0.20

0.01

filter-paper-quantitative-grade-42

CAT NO

DIAMETER SIZE

PACK SIZE

1442-042

4.25cm

400

1442-047

4.7cm

400

1442-055

5.5cm

400

1442-070

7cm

100

1442-090

9cm

100

1442-110

11cm

100

1442-125

12.5cm

100

1442-150

15cm

100

1442-185

18.5cm

100

1442-240

24cm

100

1442-320

32cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Ashless

43

Intermediate retention and flow rate between Nos. 40 and 41

Medium/Fast

16

L

0.21

0.01

filter-paper-quantitative-grade-43

CAT NO

DIAMETER SIZE

PACK SIZE

1443-090

9cm

100

1443-110

11cm

100

1443-125

12.5cm

100

1443-150

15cm

100

1443-185

18.5cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Ashless

44

Thin version of No. 42

Slow

3

L

0.17

0.01

filter-paper-quantitative-grade-44

CAT NO

DIAMETER SIZE

PACK SIZE

1444-070

7cm

400

1444-090

9cm

400

1444-110

11cm

400

1444-125

12.5cm

100

1444-150

15cm

100

1444-185

18.5cm

100

1444-240

24cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Hardened 50

For retention of finest crystalline precipitates. Highly glazed surface

Slow

2.7

H

0.12

0.025

filter-paper-quantitative-grade-50

CAT NO

DIAMETER SIZE

PACK SIZE

1450-042

4.25cm

100

1450-055

5.5cm

100

1450-070

7cm

100

1450-090

9cm

100

1450-110

11cm

100

1450-125

12.5cm

100

1450-150

15cm

100

1450-185

18.5cm

100

1450-240

24cm

100

1450-320

32cm

100

1450-400

40cm

100

1450-500

50cm

100

1450-561

60.96

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Hardened 52

General purpose hardened grade

Medium

7

H

0.17

0.025

filter-paper-quantitative-grade-52

CAT NO

DIAMETER SIZE

PACK SIZE

1452-070

7cm

100

1452-090

9cm

100

1452-110

11cm

100

1452-125

12.5cm

100

1452-150

15cm

100

1452-240

24cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Hardened 54

For filtration of coarse and gelatinous precipitates

Fast

20-25

H

0.18

0.025

filter-paper-quantitative-grade-52

CAT NO

DIAMETER SIZE

PACK SIZE

1454-055

5.5cm

100

1454-070

7cm

100

1454-090

9cm

100

1454-110

11cm

100

1454-125

12.5cm

100

1454-150

15cm

100

1454-185

18.5cm

100

1454-240

24cm

100

1454-320

32cm

100

1454-500

50cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Hardened Ashless

540

General purpose hardened ashless paper

Medium

8

H

0.15

0.008

filter-paper-quantitative-grade-540

CAT NO

DIAMETER SIZE

PACK SIZE

1540-042

4.25cm

100

1540-055

5.5cm

100

1540-070

7cm

100

1540-090

9cm

100

1540-110

11cm

100

1540-125

12.5cm

100

1540-150

15cm

100

1540-185

18.5cm

100

1540-240

24cm

100

1540-270

27cm

100

1540-320

32cm

100

1540-321

2.1cm

100

1540-324

2.4cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Hardened Ashless

541

For filtration of coarse and gelatinous precipitates

Fast

20-25

H

0.16

0.008

filter-paper-quantitative-grade-541

CAT NO

DIAMETER SIZE

PACK SIZE

1541-042

4.25cm

400

1541-047

4.7cm

100

1541-055

5.5cm

100

1541-070

7cm

100

1541-085

8.5cm

100

1541-090

9cm

100

1541-110

11cm

100

1541-125

12.5cm

100

1541-150

15cm

100

1541-185

18.5cm

100

1541-240

24cm

100

1541-270

27cm

100

1541-320

32cm

100

1541-400

40cm

100

Grade No

 

Flow rate

Retention microns

Wet Strength

Thickness, mm

Ash %

Hardened Ashless

542

Highly retentive for fine precipitates

Slow

2.7

H

0.15

0.008

filter-paper-quantitative-grade-542

CAT NO

DIAMETER SIZE

PACK SIZE

1542-055

5.5cm

400

1542-070

7cm

100

1542-090

9cm

100

1542-110

11cm

100

1542-125

12.5cm

100

1542-150

15cm

100

1542-185

18.5cm

100

1542-240

24cm

100

1542-400

40cm

100

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