Name: Macherey-Nagel Special Indicator Paper pH 12.0–14.0 Refill Pack of 3 Rolls
Brand: Macherey-Nagel
SKU: 9.130 351
Price: 61.2 SGD
Availability: BackOrder

Cleaning and Sterilisation

Cleanroom

Miscellaneous

Analytical Measurement and Testing

Chromatography

Distillation, Separation, Filtration

Environmental, Soil, Water & Food Analysis

General Laboratory Consumables

Heating and Cooling Technology

Life Sciences

Liquid Handling

Occupational Safety and Security

Optical Instruments and Microscopes

Sample Preparation

Stirring, Shaking, Mixing

Vacuum Technology, Drying, Dry Storage

LabFriend Singapore

facebook

twitter

youtube

LabFriend Corporate

LabFriend Australia

LabFriend India

LabFriend Indonesia

LabFriend Korea

LabFriend Malaysia

LabFriend New Zealand

LabFriend  Philippines

LabFriend South Africa

LabFriend Sri Lanka

LabFriend Vietnam

LabFriend Taiwan

LabFriend MENA

The Macherey-Nagel Universal Indicator Paper (pH 5.5-9.0) offers a reliable solution for accurate pH testing within a specific range of 5.5 to 9.0. This paper is provided in a convenient 5-meter roll, making it ideal for continuous testing in laboratories, educational settings, and fieldwork applications. It is perfect for determining pH levels in slightly acidic to slightly alkaline solutions.

Key Features:

<ul>
<li>Brand: Macherey-Nagel</li>
<li>Product Type: Universal pH Indicator Paper</li>
<li>pH Range: 5.5-9.0, designed for testing neutral to mildly alkaline solutions</li>
<li>Quantity: Roll of 5 meters</li>
<li>Application: Suitable for laboratory tests, classroom experiments, and field studies</li>
<li>Convenient and Economical: Easy to use and allows for continuous testing with a long 5-meter roll</li>
</ul>

With this Universal Indicator Paper from Macherey-Nagel, you'll be able to quickly and accurately measure pH levels within the range of 5.5 to 9.0. Whether in a scientific lab, classroom, or outdoor setting, this high-quality paper provides precise pH readings for a wide range of applications.

Shop Macherey-Nagel Universal Indicator Paper (pH 5.5-9.0) in a 5m roll. Ideal for testing pH in neutral to mildly alkaline solutions.

Macherey-Nagel Universal Indicator Paper (pH 5.5-9.0), 5m Roll for pH Testing

Macherey-Nagel Universal Indicator Paper (pH 5.5-9.0), Roll of 5m

Universal indicator papers,in rolls,5,5-9 pH 90209

Macherey-Nagel Indicator Paper pH 55-90 is designed for precise pH testing across a range of 55 to 90. This refill pack includes 3 rolls of high-quality indicator paper, perfect for laboratories and field applications. The paper provides reliable and accurate results, making it ideal for measuring pH in various substances quickly and effectively.

Key Features:

<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 55-90</li>
 <li>Pack Size: Refill pack containing 3 rolls</li>
 <li>Application: Suitable for laboratory and field pH testing</li>
 <li>Accuracy: Fast and reliable pH measurement</li>
</ul>

This refill pack is an essential addition to any laboratory, offering a cost-effective solution for consistent and accurate pH testing over an extended period.

Reliable pH testing with Macherey-Nagel Indicator Paper pH 55-90, Refill Pack of 3 Rolls for accurate and efficient pH measurement.

Macherey-Nagel Indicator Paper pH 55-90 - Refill Pack of 3 Rolls

Indicator paper,pH 5,5 - 9,0,refill-pack of 3rolls

The Macherey-Nagel Universal Indicator Papers pH 3.8-5.8 are designed for precise pH measurement in a wide range of laboratory and industrial applications. This roll of 5 meters offers a convenient and reliable way to test the pH of liquids, with a color change range of pH 3.8 to 5.8. The indicator papers provide quick and accurate pH readings, essential for various chemical and biological processes.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 3.8-5.8 for accurate pH measurement</li>
 <li>Material: High-quality, durable indicator paper</li>
 <li>Length: 5 meters of indicator paper per roll</li>
 <li>Application: Ideal for pH testing in laboratories and industrial settings</li>
 <li>Packaging: Sold as a roll of 5 meters</li>
</ul>

Macherey-Nagel's Universal Indicator Papers offer reliable and efficient pH testing, providing clear results for accurate pH analysis in a variety of environments.

Perform accurate pH testing with Macherey-Nagel Universal Indicator Papers, pH 3.8-5.8, providing clear results in a 5-meter roll.


Macherey-Nagel Universal Indicator Papers pH 3.8-5.8, Roll of 5 m


Universal indicator papers, pH 3.8 - 5.8, roll of 5 m

The Macherey-Nagel Special Indicator Paper pH 5.4-7.0 Refill is designed for accurate and reliable pH testing in laboratory environments. This indicator paper features a pH range of 5.4 to 7.0, making it ideal for a variety of applications, from research to educational purposes. The refill pack contains 3 rolls of paper, ensuring long-lasting usage for consistent pH measurements. With its precise color-changing properties, it offers excellent visual results for clear pH determination.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 5.4 to 7.0, suitable for a wide range of pH testing</li>
 <li>Packaging: Refill pack of 3 rolls for extended use</li>
 <li>Application: Ideal for laboratory and educational use for pH measurement</li>
 <li>Color Change: Reliable color indicators for clear pH reading</li>
</ul>

Macherey-Nagel's Special Indicator Paper provides a convenient and efficient solution for accurate pH testing, ensuring precise results in various laboratory settings.

Get precise pH measurements with Macherey-Nagel Special Indicator Paper pH 5.4-7.0 Refill, including 3 rolls for long-lasting use.


Macherey-Nagel Special Indicator Paper pH 5.4-7.0 Refill, Pack of 3 Rolls


Special indicator paper pH 5.4-7.0, refill pack of 3 rolls

The Macherey-Nagel Indicator Paper pH 9-13 Roll is designed for quick and reliable pH testing in various laboratory and field applications. This indicator paper provides a color change in the pH range of 9 to 13, offering precise and easy-to-read results. With a 5-meter roll, it provides extended use for regular pH measurements in research and industrial settings.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 9-13 for testing alkaline substances</li>
 <li>Format: 5-meter roll for long-lasting use</li>
 <li>Application: Ideal for laboratory, research, and field pH testing</li>
 <li>Accuracy: Provides reliable color change for clear results</li>
</ul>

Macherey-Nagel's Indicator Paper is an essential tool for any laboratory or fieldwork requiring accurate pH measurements, ensuring dependable results for your analysis.

Accurate pH testing with Macherey-Nagel Indicator Paper pH 9-13 Roll—ideal for laboratories and field applications with a 5-meter length.


Macherey-Nagel Indicator Paper pH 9-13 Roll with 5 m


The Macherey-Nagel Special Indicator Paper pH 12.0-14.0 Roll is a high-quality pH indicator paper designed for quick and accurate pH testing in laboratory environments. With a pH range of 12.0 to 14.0, this indicator paper provides clear, color-coded results for highly alkaline solutions. The 5-meter roll ensures an ample supply for repeated use, making it an essential tool for laboratories, educational settings, and fieldwork.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 12.0 to 14.0 for testing highly alkaline solutions</li>
 <li>Material: Specially designed to offer clear and reliable color changes</li>
 <li>Length: 5 meters for long-lasting use</li>
 <li>Application: Ideal for laboratory testing and fieldwork in highly alkaline environments</li>
</ul>

Macherey-Nagel's Special Indicator Paper is a must-have for precise pH testing in various research and analytical applications.

Perform precise pH testing with Macherey-Nagel Special Indicator Paper (pH 12.0-14.0) Roll, ideal for highly alkaline solutions.


Macherey-Nagel Special Indicator Paper pH 12.0-14.0 Roll, 5m


Special indicator paper pH 12.0-14.0, roll à 5 m

The Macherey-Nagel Special Indicator Paper Roll is designed for accurate pH measurement in a range of 7.2–9.7. This high-quality indicator paper is ideal for rapid pH testing in laboratory and field applications. The 5-meter roll provides an extended usage for multiple tests, ensuring convenience and cost-effectiveness. Macherey-Nagel’s indicator paper delivers precise and reliable results, making it a valuable tool for researchers and technicians.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>Measurement Range: pH 7.2–9.7 for accurate pH testing</li>
 <li>Material: Special indicator paper for clear and reliable results</li>
 <li>Length: 5-meter roll for multiple tests</li>
 <li>Application: Ideal for laboratory and field pH testing</li>
</ul>

Macherey-Nagel’s Special Indicator Paper Roll is the perfect solution for precise pH testing in a wide range of applications, offering both convenience and accuracy.

Get accurate pH readings with Macherey-Nagel Special Indicator Paper Roll, measuring pH 7.2–9.7 for reliable laboratory testing.


Macherey-Nagel Special Indicator Paper Roll 5 m, pH 7.2–9.7


Special indicator paper roll 5 m, pH 7,2-9,7

Macherey-Nagel Universal Indicator Paper pH 0.5-5.5 is a high-quality pH testing paper ideal for determining pH levels from 0.5 to 5.5. This roll of 5 meters provides a cost-effective solution for both laboratory and field applications, offering reliable and quick pH measurements with accurate results. The indicator paper is versatile and easy to use, making it a valuable tool in various scientific and industrial settings.

Key Features:

<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 0.5-5.5</li>
 <li>Length: Roll of 5 meters</li>
 <li>Application: Suitable for laboratory and field pH testing</li>
 <li>Accuracy: Fast and reliable pH measurement</li>
</ul>

This universal indicator paper provides high precision and is perfect for a range of applications where pH measurement in the acidic range is required.

Reliable and quick pH testing with Macherey-Nagel Universal Indicator Paper pH 0.5-5.5, roll of 5 meters for laboratory and field use.

Macherey-Nagel Universal Indicator Paper pH 0.5-5.5

Macherey-Nagel Universal Indicator Paper pH 0.5-5.5 - Roll of 5 m

Universal indicator papers, pH 0.5 - 5.5, roll of 5 m

The Macherey-Nagel Indicator Paper pH 0.5-5.5 Refill is designed for quick and accurate pH testing in a wide range of laboratory applications. This indicator paper offers a pH range of 0.5 to 5.5, making it ideal for use in acidic environments. Each pack contains 3 rolls, providing a convenient and cost-effective solution for regular pH measurements in laboratories, schools, and research facilities.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 0.5 to 5.5 for accurate measurement of acidic substances</li>
 <li>Quantity: Pack of 3 rolls for extended use</li>
 <li>Application: Ideal for laboratories, research, and educational purposes requiring pH testing in acidic environments</li>
 <li>Convenience: Easy-to-use, disposable indicator paper for quick and reliable results</li>
</ul>

Macherey-Nagel Indicator Paper provides reliable pH testing for acidic environments, ensuring consistent and accurate results in various laboratory settings.

Test pH accurately with Macherey-Nagel Indicator Paper pH 0.5-5.5 Refill, featuring 3 rolls for reliable pH measurement in acidic environments.


Macherey-Nagel Indicator Paper pH 0.5-5.5 Refill, Pack of 3 Rolls


Indicator paper,pH 0,5 - 5,5,refill-pack of 3rolls

The Macherey-Nagel Special Indicator Paper pH 6.4-8.0 Roll is designed for accurate pH testing in laboratory and field applications. With a pH range of 6.4 to 8.0, this indicator paper is ideal for detecting the pH of aqueous solutions, providing quick and reliable results. The 5-meter roll ensures extended use, making it a practical and cost-effective solution for frequent pH measurements.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 6.4 to 8.0, suitable for a variety of applications</li>
 <li>Material: High-quality indicator paper for precise pH measurement</li>
 <li>Length: 5 meters of paper for extended usage</li>
 <li>Application: Ideal for laboratory and field pH testing</li>
</ul>

Macherey-Nagel's Special Indicator Paper offers an efficient and durable solution for accurate pH testing in various laboratory settings.

Conduct accurate pH testing with Macherey-Nagel Special Indicator Paper, offering a 6.4-8.0 pH range for reliable results.


Macherey-Nagel Special Indicator Paper pH 6.4-8.0 Roll, 5 m


Special indicator paper pH 6.4-8.0, roll à 5 m

The Macherey-Nagel Special Indicator Paper pH 4.0-7.0 Refill is designed for accurate pH testing in the laboratory. This indicator paper is ideal for determining the pH range of 4.0 to 7.0, making it suitable for a variety of applications where precision is crucial. The refill pack includes 3 rolls, ensuring a long-lasting supply for frequent use in research and analytical environments.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 4.0-7.0 for accurate testing in neutral to slightly acidic/alkaline ranges</li>
 <li>Packaging: Refill pack containing 3 rolls of indicator paper</li>
 <li>Application: Ideal for use in laboratories, educational settings, and field testing</li>
 <li>Durability: Long-lasting and reliable for consistent results</li>
</ul>

Macherey-Nagel's Special Indicator Paper provides a reliable and convenient solution for pH testing, ensuring precise and repeatable measurements across various applications.

Get reliable pH testing with Macherey-Nagel Special Indicator Paper (pH 4.0-7.0) Refill, featuring 3 rolls for extended use.


Macherey-Nagel Special Indicator Paper pH 4.0-7.0 Refill (Pack of 3 Rolls)


Special indicator paper pH 4.0-7.0, refill pack of 3 rolls

The Macherey-Nagel Special Indicator Paper pH 9.0-13.0 Refill is designed for accurate pH testing in the range of 9.0 to 13.0. Ideal for laboratories and educational settings, this indicator paper provides reliable results for a variety of chemical and analytical applications. Sold in a convenient pack of 3 rolls, it is an essential tool for any laboratory requiring efficient and precise pH measurement solutions.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 9.0 to 13.0 for precise pH measurement</li>
 <li>Material: Special indicator paper for accurate results</li>
 <li>Quantity: Pack of 3 rolls for convenient refilling</li>
 <li>Application: Ideal for laboratory and educational pH testing needs</li>
</ul>

Macherey-Nagel's Special Indicator Paper is the perfect solution for high-quality, reliable pH testing in various scientific applications.

Accurate pH testing with Macherey-Nagel Special Indicator Paper, pH 9.0-13.0 range, available in a convenient 3-roll pack.


Macherey-Nagel Special Indicator Paper pH 9.0-13.0 Refill, Pack of 3 Rolls


Special indicator paper pH 9.0-13.0, refill pack of 3 rolls

The Macherey-Nagel Special Indicator Paper pH 6.4–8.0 Refill Pack includes 3 rolls of high-quality pH indicator paper, ideal for quick and accurate pH testing in laboratory or field environments. Specifically calibrated for the pH range of 6.4 to 8.0, this indicator paper delivers precise color changes for effective analysis in biochemical, environmental, or educational applications.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 6.4–8.0 for precise detection within a narrow pH window</li>
 <li>Format: Refill pack containing 3 rolls</li>
 <li>Use Case: Suitable for lab testing, field sampling, and educational demonstrations</li>
 <li>Convenience: Easy to dispense and read with clear color changes</li>
</ul>

Macherey-Nagel’s Special Indicator Paper provides

Get accurate pH readings with Macherey-Nagel Special Indicator Paper pH 6.4–8.0—includes 3-roll refill pack for lab and field use.


Macherey-Nagel Special Indicator Paper pH 6.4–8.0 Refill Pack of 3 Rolls


Special indicator paper pH 6.4-8.0, refill pack of 3 rolls

The Macherey-Nagel Special Indicator Paper pH 3.8–5.8 Refill Pack contains 3 rolls of precision-grade pH paper, designed for accurate pH testing in slightly acidic environments. With a clear color transition specific to the pH range of 3.8 to 5.8, this refill pack is ideal for laboratory analyses, quality control, and educational experiments requiring reliable acid-level measurements.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 3.8–5.8 for detecting mildly acidic conditions</li>
 <li>Format: Refill pack with 3 convenient rolls</li>
 <li>Application: Suitable for laboratory, industrial, and academic use</li>
 <li>Ease of Use: Offers clear and consistent color changes for quick readings</li>
</ul>

Macherey-Nagel’s Special Indicator Paper pH 3.8–5.8 is a reliable tool for professionals who require accurate and consistent pH readings in critical testing situations.

Test acidic samples with Macherey-Nagel Special Indicator Paper pH 3.8–5.8—refill pack includes 3 rolls for accurate lab testing.


Macherey-Nagel Special Indicator Paper pH 3.8–5.8 Refill Pack of 3 Rolls


Special indicator paper pH 3.8-5.8, refill pack of 3 rolls

The Macherey-Nagel Special Indicator Paper pH 7.2–9.7 Refill Pack includes 3 rolls of precision pH test paper, specially designed for effective testing in the alkaline range. This indicator paper is ideal for laboratory, industrial, and educational use where reliable pH monitoring is essential. The clear and consistent color change across the pH range ensures accurate readings every time.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 7.2–9.7 for alkaline pH testing</li>
 <li>Format: Refill pack of 3 rolls</li>
 <li>Application: Suitable for lab, field, and educational use</li>
 <li>Accuracy: Clear color transitions for consistent and accurate results</li>
</ul>

Macherey-Nagel’s Special Indicator Paper offers a reliable and easy

Test alkaline pH levels with Macherey-Nagel Special Indicator Paper pH 7.2–9.7—3-roll refill pack for lab, industrial, or field use.


Macherey-Nagel Special Indicator Paper pH 7.2–9.7 Refill Pack of 3 Rolls


Special indicator paper pH 7.2-9.7, refill pack of 3 rolls

The Macherey-Nagel Special Indicator Paper pH 8.0–10.0 Roll offers a reliable and accurate method for testing alkaline pH levels in laboratory and field settings. With a 5-meter roll format, it provides extended use for routine analysis. This high-quality indicator paper delivers sharp, clear color transitions specifically within the 8.0 to 10.0 pH range, ensuring dependable results for scientific and educational applications.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 8.0–10.0 for alkaline testing</li>
 <li>Format: 5-meter roll for extended use</li>
 <li>Use Case: Ideal for laboratory, industrial, and educational pH analysis</li>
 <li>Color Change: Precise and easy-to-read color transitions</li>
</ul>

Macherey-Nagel’s Special Indicator Paper is the perfect tool for professionals requiring accurate pH detection within alkaline environments.

Test alkaline pH levels accurately with Macherey-Nagel Special Indicator Paper pH 8.0–10.0—5 m roll for extended lab use.


Macherey-Nagel Special Indicator Paper pH 8.0–10.0 Roll, 5 m


Special indicator paper pH 8.0-10.0, roll à 5 m

The Macherey-Nagel Universal Indicator Papers pH 5.4–7.0 come in a convenient 5-meter roll format, ideal for semi-quantitative pH testing in laboratories, classrooms, or fieldwork. These universal indicator papers offer reliable performance and clear color differentiation within the narrow pH range of 5.4 to 7.0, enabling accurate monitoring of neutral and slightly acidic environments.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 5.4–7.0 for monitoring near-neutral solutions</li>
 <li>Length: 5-meter roll for extended use</li>
 <li>Application: Suitable for lab, educational, and field applications</li>
 <li>Clarity: Provides distinct color transitions for accurate pH interpretation</li>
</ul>

Macherey-Nagel’s universal pH paper delivers dependable results for users who require consistent and precise pH testing near the neutral range.

Macherey-Nagel Universal Indicator Paper pH 5.4–7.0—accurate, reliable pH testing in a 5 m roll for lab, field, or classroom use.


Macherey-Nagel Universal Indicator Papers pH 5.4–7.0 Roll of 5 m


Universal indicator papers, pH 5.4 - 7.0, roll of 5 m

The Macherey-Nagel Special Indicator Paper pH 8.0–10.0 Refill Pack offers 3 rolls of high-precision pH indicator paper designed for accurate alkaline range detection. Ideal for laboratory, industrial, and educational applications, this refill pack delivers reliable color changes for the pH range of 8.0 to 10.0, ensuring dependable results in every test.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 8.0–10.0 for alkaline sample testing</li>
 <li>Format: Refill pack with 3 rolls</li>
 <li>Applications: Suitable for labs, field testing, and educational use</li>
 <li>Design: Easy-to-use dispenser with clear and accurate color scale</li>
</ul>

Macherey-Nagel’s Special Indicator Paper is the ideal tool for professionals needing fast, simple, and accurate pH measurement in the 8.0 to 10.0 range.

Test alkaline samples easily with Macherey-Nagel Special Indicator Paper pH 8.0–10.0—refill pack of 3 rolls for lab and field use.


Macherey-Nagel Special Indicator Paper pH 8.0–10.0 Refill Pack of 3 Rolls


Special indicator paper pH 8.0-10.0, refill pack of 3 rolls

The Macherey-Nagel Universal Indicator Papers pH 4.0–7.0 come in a 5-meter roll, providing reliable and precise pH detection across the acidic to neutral range. These indicator papers are ideal for a wide range of laboratory and educational uses, delivering clear, rapid color changes to reflect pH levels accurately.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 4.0–7.0 for effective monitoring of acidic to neutral conditions</li>
 <li>Length: 5-meter roll for extended usage</li>
 <li>Application: Suitable for laboratories, classrooms, and environmental testing</li>
 <li>Clarity: Distinct and consistent color transitions for accurate readings</li>
</ul>

Macherey-Nagel’s Universal Indicator Paper offers a dependable solution for professionals and educators who require consistent and accurate pH testing within the 4.0 to 7.0 range.

Monitor pH from 4.0 to 7.0 with Macherey-Nagel Universal Indicator Papers—5 m roll for accurate, reliable lab and classroom testing.


Macherey-Nagel Universal Indicator Papers pH 4.0–7.0 Roll of 5 m


Universal indicator papers, pH 4.0 - 7.0, roll of 5 m

Special indicator paper pH 12.0-14.0, refill pack of 3 rolls_100194222

The Macherey-Nagel Special Indicator Paper pH 12.0–14.0 Refill Pack includes 3 rolls of high-quality pH paper specially designed for alkaline range detection. Offering rapid and reliable results, this indicator paper is ideal for chemical laboratories, industrial testing, and research requiring precise identification of highly basic solutions.

Key Features:
<ul>
 <li>Brand: Macherey-Nagel</li>
 <li>pH Range: 12.0–14.0 for strong alkaline detection</li>
 <li>Format: Refill pack with 3 easy-to-use rolls</li>
 <li>Use Case: Suited for lab analysis, educational experiments, and industrial applications</li>
 <li>Reliability: Fast color change and clear results for accurate alkaline measurement</li>
</ul>

Macherey-Nagel’s Special Indicator Paper is a dependable tool for professionals who need quick and precise alkaline pH testing in critical testing environments.

Test high pH levels easily with Macherey-Nagel Special Indicator Paper pH 12.0–14.0—includes 3-roll refill pack for accurate results.


Macherey-Nagel Special Indicator Paper pH 12.0–14.0 Refill Pack of 3 Rolls


Macherey-Nagel

Special indicator paper pH 12.0-14.0, refill pack of 3 rolls

Macherey-Nagel Special Indicator Paper pH 12.0–14.0 Refill Pack of 3 Rolls

SG $61.20

Product overview

Product Specifications

View all Macherey-Nagel products