Qualitative Filter Paper, 303 Grade, 55mm -320mm

£5.56 to £27.77

Select Pack Size:

Code: Please choose option from drop down above

Variation ID		Product Code	Pack Size	List Price
23785	photo_camera	303055	55mm x 100 Pack 303055	£5.56
23786	photo_camera	303070	70mm x 100 Pack 303070	£5.80
23787	photo_camera	303090	90mm x 100 Pack 303090	£6.37
23788	photo_camera	303110	110mm x 100 Pack 303110	£6.91
23789	photo_camera	303125	125mm x 100 Pack 303125	£7.60
23790	photo_camera	303150	150mm x 100 Pack 303150	£8.56
23791	photo_camera	303185	185mm x 100 Pack 303185	£10.15
23792	photo_camera	303240	240mm x 100 Pack 303240	£13.98
23793	photo_camera	303300	300mm x 100 Pack 303300	£18.93
23794	photo_camera	303320	320mm x 100 Pack 303320	£27.77

Standard Qualitative Filter Papers are used for low gravity, or quadrant-folded applications. They have a higher level of α- cellulose than other filter papers. This means that they will weaken when the papers are introduced to water. We do not recommend Standard Qualitative Filter Papers if wet handling or vacuum work is necessary. In routine quadrant-folded applications the underlying strength of standard (untreated) grades does not present an issue.

Grade 303: is a medium-filtering qualitative paper with a larger pore size and higher absorbency than Grade 301. It is commonly used in general laboratory filtration and is also widely employed in agricultural and environmental testing. Typical applications include plant growth trials, soil testing, and air analysis for monitoring specific contaminants, as well as the filtration of organic and sulphide precipitates.

Application: Soil Testing, Air Analysis, Organic and Sulphide Precipitate Filtration

Key Features

Qualitative Analysis: Designed for procedures focused on identifying the presence of materials in samples.

Higher Absorbency: Absorbs more liquid than Grade 301, supporting a wider range of filtration tasks.

Larger Pore Size: Offers moderate retention of fine particles with improved flow characteristics.

Environmental & Agricultural Use: Commonly used for plant growth trials, soil quality monitoring, and contaminant tracking in air samples.

Versatile Laboratory Filtration: Suitable for general lab work and applications involving organic or sulphide precipitates.

Fast liquid filtration
Plant Growth Trials
Soil Testing
Air Analysis
Filtration of organic and sulphide precipitates

Available Grades

Grade	Whatman Equivalent	Speed	Thickness (mm)	Pore Size (μM)	Weight (g/m²)	Filtration Speed (sec*)	Burst Strength (kg/cm²)
301	= No.5	Very Slow Filtering	0.14	2-3	84	180	> 0.30
302	= No.3	Medium Filtering	0.3	12-16	150	65	3.90
303	= No.2	Medium Filtering	0.16	5-8	87	50	> 0.10
304	= No.1	Medium Filtering	0.16	5-13	73	88	1.95
305	= No.4	Fast Filtering	0.20	12-15	84	10	> 0.30