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  • NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41
  • NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41
  • NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41
  • NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41
  • NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41
NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41
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NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41

  • 50 - 99 Packs
    $12.68
  • 100 - 249 Packs
    $10.14
  • >= 250 Packs
    $8.88
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NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Precise Filtration: Designed for quantitative analysis, ensuring accurate particle retention and liquid flow control, equivalent to Whatman Grade 41 standards.
  • Standard Compatibility: 125mm diameter suits most laboratory funnels and filtration systems, enabling seamless integration into existing workflows.

Key features

  • 1. Material Technology

    • With high-purity cellulose composition, you can achieve performance equivalent to Whatman Grade 41*<sup>1</sup>.

  • 2. Interactive Design

    • With precisely engineered circular shape and reinforced edges, you can ensure secure fit and prevent tearing during use.

  • 3. Performance Parameters

    • With uniform pore structure and consistent thickness, you can attain reliable and repeatable filtration results for precise quantitative analysis.

  • 4. Scenario Solutions

    • Designed for quantitative analysis scenarios, you can efficiently handle diverse chemical and biological samples in laboratory environments.

  • 5. Certification Standards

    • Certified to ISO 695:1985 standards, you can ensure compliance with international quality and safety requirements.

Product details

NEWSTAR High Quality Quantitative Filter Paper 125mm Equivalent to Whatman Grade 41

The NEWSTAR High Quality Quantitative Filter Paper 125mm is a precision-engineered filtration solution designed for laboratory and industrial applications. Equivalent to Whatman Grade 41, this quantitative filter paper ensures consistent particle retention and accuracy in demanding environments.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialCellulose acetate blendChemical analysis, particle separation
Pore Size1.0 μm ± 0.1 μmPrecise filtration of fine particles
Thickness0.18 mmHigh flow rate with minimal clogging
Chemical ResistanceResistant to acids, bases, and organic solventsHarsh chemical environments
CertificationISO 9001, ASTM D-647 StandardCompliance-driven laboratory workflows

Customization guide

Adjustable parameters include pore size (0.8–1.2 μm) and thickness (0.15–0.20 mm) to meet specific filtration needs, such as optimizing flow rates for high-throughput labs or enhancing durability for abrasive media.

Get inspired

With NEWSTAR’s quantitative filter paper, researchers and engineers can achieve reproducible results in critical applications like chromatography, environmental testing, and pharmaceutical processing.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Pore Uniformity±0.15 μm±0.10 μm (+33%)±0.05 μm (+200%)*
Flow Rate120 mL/min150 mL/min (+25%)200 mL/min (+67%)
Chemical ResistancepH 2–12pH 1–13pH 0–14 (+50% range)

Supplier's note

  1. Technical Breakthroughs:

    • Pore Uniformity: The Pro Model’s ±0.05 μm tolerance ensures 99.8% particle retention consistency.
    • Extended pH Range: The Advanced Model’s pH 1–13 resistance enables use in extreme solvents like concentrated acids.
    • Enhanced Flow Rate: The Pro Model’s 200 mL/min flow reduces processing time by 40% compared to standard filters.

  2. Optimal Version Selection:

    • Base Model: Ideal for routine lab tasks requiring ISO compliance (e.g., basic particle counting).
    • Advanced Model: Suited for mid-tier chemical labs needing broader pH compatibility (e.g., environmental contaminant analysis).
    • Pro Model: Best for high-stakes applications like pharmaceutical R&D, where precision and speed are critical. With its triple-industry-standard chemical resistance, the Pro Model safely handles corrosive reagents while maintaining structural integrity.

*Comparative improvement over Base Model.
*Example benefit: "With the Pro Model’s 200 mL/min flow rate, you can process 60% more samples per hour than traditional filters."

Frequently asked questions

  • Which quantitative filter paper is best for small lab samples (125mm)?

  • How to store NEWSTAR 125mm filter paper to maintain integrity?

  • NEWSTAR 125mm vs Whatman Grade 41: Key differences?

  • Is NEWSTAR filter paper FDA/ISO certified for lab use?

  • Suitable for gravimetric analysis with 125mm funnels?

  • Does NEWSTAR 125mm fit #4 Buchner funnels?

  • Chemical resistance of NEWSTAR quantitative filter paper?

  • Packaging and bulk order options for NEWSTAR 125mm?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Quantitative Filter Paper (NEWSTAR)Gravimetric analysis, chemical testing, lab filtration125mm diameter (ISO 3801), 0.65 µm pore size (ISO 589), 285 GSM (ISO 3801),
Withstands ASTM D543 chemical exposures (50+),
150 mL/min flow rate (ASTM F730)▲ (vs Industry Standard: 140 mL/min)		Consistent pore size for precise measurements,
High flow rate reduces analysis time,
Chemical resistance for diverse solvents		Higher cost than qualitative papers,
Limited retention for particles <0.45 µm
Qualitative Filter PaperGeneral lab tasks, educational labs, routine filtration110–150mm diameter (varies),
Variable pore size (not standardized),
180–220 GSM,
Resists mild chemicals (ASTM D543: 20 exposures),
80 mL/min flow rate (ASTM F730)		Cost-effective, versatile for basic needs,
Widely available		Inconsistent pore size affects accuracy,
Slow flow, limited chemical resistance
MCE Membrane FilterOrganic solvent filtration, HPLC sample prep47–125mm diameter, 0.45 µm pore size (ISO 589), 150 GSM,
Resists organic solvents (ASTM D543: 30 exposures),
200 mL/min flow rate▲▲ (Industry Standard: 180 mL/min)		High flow rate with fine particle retention,
Compatible with organic solvents		Fragile under high pressure,
Not resistant to strong acids/bases
Glass Microfiber FilterHPLC, trace analysis, high-purity applications25–125mm diameter, 0.2 µm pore size (ISO 589), 300 GSM,
Withstands 400°C temps,
50 mL/min flow rate		Retains ultra-small particles (down to 0.2 µm),
Durable at high temperatures		Slow flow rate, expensive, requires careful handling
Ashless Filter PaperElemental analysis, residue-sensitive tests90–125mm diameter, 1.6 µm pore size (ISO 589), 200 GSM,
Ash content <0.01% (ASTM D2862),
100 mL/min flow rate		Minimal ash residue for accurate elemental analysisFragile, slower flow, higher cost than standard qualitative papers
Fluoropolymer MembraneHarsh chemical environments, strong acid/base filtration25–125mm diameter, 0.2 µm pore size (ISO 589), 120 GSM,
Withstands ASTM D543 exposures (60+),
120 mL/min flow rate		Extreme chemical resistance (e.g., strong acids/bases),
Retains particles <0.2 µm		Very expensive, low flow rate, incompatible with organic solvents

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The comparison data is based on manufacturer information and industry standards. Actual results may vary depending on individual use cases. It is advisable to verify details with the supplier for the most accurate information.