Cellulose Quantitative Filter Paper, Ashless, Slow, Grade 44, 2-4um, 125mm, Nonsterile, 100/Pk
GVS SKU: FP125DSL44QANC01

Featuring a refined cellulose depth medium made of pure cotton linters with an alpha-cellulose content of virtually 100%, this Grade 44 quantitative ashless filter paper delivers fine particle retention for critical gravimetric work. Each 125mm circle provides a slow-flow filtration characteristic with a 2 to 4 um nominal retention range, a nominal thickness of 160 um, and a nominal basis weight of 85 g/m2. With an ash content of less than 0.007%, the paper minimizes residual mass and supports accurate ash-free dry weight determinations.

Key Cellulose Media Characteristics

• Quantitative ashless cellulose paper with an ash content below 0.007% for low residual mass in gravimetric analysis
• Nominal particle retention range of 2 to 4 um for capture of fine precipitates
• Slow filtration speed suited to difficult clarifications and fine precipitate recovery
• Manufactured from refined pulp and pure cotton linters with virtually 100% alpha-cellulose content
• Nominal thickness of 160 um and nominal basis weight of 85 g/m2

Key Construction Characteristics

• Circular disc format, 125mm diameter
• Nonsterile cellulose construction
• Suitable for Buchner funnels and filtration under pressure
• Supplied 100 discs per pack

This paper maintains consistent retention and flow behavior across repeated filtrations, helping preserve sample integrity in demanding analytical procedures. Its low ash content and fine retention make it well suited for quantitative determinations where accurate ash-free dry mass is essential.

Diameter

125mm

Flow Speed

Slow

Grade

DSL44 (Grade 44)

Hardened (Yes/ No)

No

Material

Cellulose

Mesh Format

Circle

Nominal Ash Content (%)

<0.007

Nominal Basis Weight (g/ m²)

85

Nominal Thickness (µm)

160

Pack Count

100

Particle Retention

2-4 um

Pore Size (µm)

2-4

Qualitative/ Quantitative

Quantitative

Sartorius Equivalent

Grade 5C

Sterility

Nonsterile

Wettability

Hydrophilic

Whatman Equivalent

Grade 44

• Gravimetric Analysis Its ashless composition under 0.007% supports accurate ash-free dry mass measurements in quantitative determinations.
• Fine Precipitate Recovery The 2 to 4 um retention range captures fine precipitates such as those formed in classical analytical separations.
• Difficult Clarifications The slow-flow medium handles hard-to-clarify liquids that require fine retention.
• Buchner Funnel Filtration The paper is suited to vacuum filtration in Buchner funnels and to filtration under pressure.
• Quantitative Sample Preparation The high-purity cellulose supports preparation of samples for downstream quantitative analysis.