Nitrocellulose Membrane Disc Filters, 0.45um, 47mm, White Gridded, Nonsterile, 100/Pk
GVS SKU: 1214977

Featuring an unsupported, naturally hydrophilic mixed cellulose ester (MCE) medium composed of inert cellulose nitrate and cellulose acetate polymers, this 47mm membrane disc delivers a 0.45 micron pore size for dependable clarification and analytical work. The uniform microporous structure provides fast flow rates and high throughput, while the white membrane carries a black grid pattern that improves optical contrast for counting and identifying colonies during microbiological analysis. Supplied nonsterile in packs of 100.

Key Nitrocellulose Membrane Characteristics

• Naturally hydrophilic: Composed of inert cellulose nitrate and cellulose acetate polymers, the membrane wets out with aqueous solutions without a separate wetting step in many workflows.
• Uniform pore structure: A 0.45 micron pore size with consistent microporous geometry provides reliable flow and diffusion rates across the membrane.
• Low extractables: Yields extractable levels of less than 4% of the membrane weight, supporting cleaner, more consistent results.
• Low ash residue: Yields a residue of less than 0.045% of its initial weight in gravimetric analysis using ashing techniques.
• Gridded surface: White membrane with a printed grid improves contrast and aids accurate colony enumeration.

Key Construction Characteristics

• Format: Unsupported flat membrane disc, 47mm diameter.
• Pore size: 0.45 micron.
• Sterility: Nonsterile; the membrane is autoclavable at 121 degrees C for 20 minutes.
• Pack: 100 discs per pack.

This membrane maintains consistent retention and flow characteristics from lot to lot, helping protect the integrity of filtered samples. Its biologically inert composition and low extractable profile make it well suited to clarification, analytical, and microbiological quality control work where reproducible results matter.

Color

White

Diameter

47mm

Extractables

Less than 4% of membrane weight

Grade

MicronSep

Grid (Yes/No)

Yes

Grid Color

Black

Material

Nitrocellulose (Mixed Cellulose Ester, MCE)

Maximum Operating Temperature (°C)

121

Membrane Color

White

Nominal Ash Content (%)

Less than 0.045%

Pack Count

100

Pore Size (µm)

0.45

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 20 minutes

Support Material

Unsupported

Wettability

Hydrophilic

• Microbiological Analysis The gridded white surface improves colony contrast for reliable enumeration and identification during routine microbiological testing.
• Sample Clarification The 0.45 micron pore size removes particulates from aqueous solutions ahead of downstream analysis.
• Particulate-Matter Analysis Uniform pore structure supports consistent capture and assessment of particulate contaminants.
• Industrial Hygiene The membrane suits sampling and analytical workflows used in industrial hygiene monitoring.
• Gravimetric Analysis Low ash residue of less than 0.045% supports gravimetric determinations using ashing techniques.
• HPLC and GC Sample Preparation Clarifies and removes fine particulates from samples prior to chromatographic injection.