WHA1091185

Whatman^® qualitative filter paper, Grade 91, creped

circles, diam. 185 mm, pack of 1000

• Synonym(s): Whatman filter, Z699608, filter paper, paper filter
• UNSPSC Code: 41104900
• NACRES: NB.24

Properties

• material: cellulose filters; circles
• packaging: pack of 1000
• manufacturer/tradename: Whatman 1091-185; Whatman Article No. 28417534 (US reference)
• parameter: 2 psi wet burst; 70 sec/100 mL speed (Herzberg)
• diam.: 185 mm
• thickness: 205 μm
• pore size: 10 μm (Particle retention)
• basis weight: 71 g/m²

Description

General description

These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in folded (prepleated) forms.

Grade 91: 10 μm (credped filter paper)
A general purpose creped filter for less critical routine analysis. Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration.

Other Notes

Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.

Legal Information

Whatman is a registered trademark of Cytiva