Note, see Whatman® conversion below.

No. 2 Qualitative Paper is slightly thicker than our No. 1 paper (see below) and will retain medium size precipitates (5-10µm). Retains medium crystalline precipitates, has a fast flow rate, and characterized with a smooth surface with 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 #2 compares directly with Whatman 1.
Our #1 compares directly with Whatman 4.

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)	-