Sartorius Green Dot Quantitative Filter Paper Discs / Grade 390 (Equivalent to Grade 40)

Sartorius Grade 390 Green Dot Quantitative Filter Paper Discs (Equivalent to Grade 40) are engineered for analytical applications that require accurate and clean filtration of fine crystalline precipitates. Manufactured from 100% high-purity cotton linters, these papers contain less than 0.01% ash after incineration, meeting the strict requirements of DIN 54370.

The Green Dot mark offers easy visual identification for laboratories that handle multiple filter types. With their dense, narrow-pore structure, these filter papers are well-suited for slow filtration tasks where maximum clarity of the filtrate is required. They are wet-strengthened, making them compatible with pressure or vacuum filtration setups.

Ideal for routine use in quantitative chemical analysis, these filter papers help ensure accurate results in laboratory workflows where consistent separation performance and low background residue are critical.

Technical specifications – Grade 390

• Weight: 84 g/m²

• Thickness: 0.16 mm

• Particle retention: 3 – 5 µm

• Filtration time: 100 s

• Ash content: ≤ 0.01 % (DIN 54370)

• Structure: Narrow-pore, dense

• Material: Refined cotton linters

• Color code: Green Dot

Available sizes and product codes