Note: see Whatman® conversion below.

No. 1 Qualitative Filter Paper is slightly thinner than our No. 2 paper with coarse retention down to 6µm. This paper is for general Filtration with fast flow rate. Designed to retain large crystalline particles and gelatinous precipitates. Has smooth surface, normal hardness.

• 100% alpha cotton cellulose
• pH tolerant 0-12
• Temperature maximum 120°C
• High ash than quantitative  

Applications:
• Clarify and remove precipitates
• Preparation for qualitative analysis

Conversion: Our #1 compares with Whatman 4.
                     Our #2 compares with Whatman 1.

		Qualitative filter paper for precipitate removal and qualitative analysis preparation:   Made of 100% alpha cotton cellulose; Ash content 0.1%   Stable from pH 0 ~ 12; thermostable up to 120°C Contact us for more information on this line of products, including conversions to other manufacturers' products.
Product Specifications
Type Applications/Comments Weight (g/m2) Thickness (mm) Retention Characteristics (μm) Collection Efficiency (%, 0.3μm DOP) No. 1 Retains large crystalline particles and gelatinous precipitates. Fast flow rate, smooth surface, normal hardness. 90 0.20 Coarse (6) 65 No. 2 Retains medium crystalline particles. Fast flow rate, smooth surface, normal hardness. 125 0.26 Medium (5) 80 No. 231 Retains crystalline particles. Moderate flow rate, smooth surface, normal hardness. 95 0.18 Medium - No. 232 Retains medium to medium-fine particles. Slow flow rate, smooth surface, normal hardness. 90 0.18 Medium/ Medium Fine - No. 131 High retention efficiencey for fine particles, like barium sulfate. Slow flow rate, smooth surface, normal hardness. 140 0.25 Medium-Fine (3) 90 No. 235 Highest retention efficiency, retaining very fine particles. Very slow flow rate, smooth surface, normal hardness. 95 0.17 Very Fine - No. 101 Seed germination; retains large particles. 80 0.21 Coarse and Gelatinous (6-7) -