The pH buffer solution for calibration - XS Basic pH 4.01 /25°C (red) - 250 ml from the GIORGIO BORMAC brand is an essential product for ensuring the accuracy of pH measurements in your laboratories. This buffer solution is designed to provide accurate and reliable calibration of your pH measuring instruments, ensuring consistent and precise results.

Main features of the pH 4.01 buffer solution

• Accuracy: ± 0.02


• Certificate: Yes, downloadable for free from the website giorgiobormac.com


• Color: Red


• Composition: Potassium hydrogen phthalate, potassium chloride


• Packaging: 250 ml with integrated calibration compartment


• Nominal value: pH 4.01 @ 25 °C


• Volume: 250 ml

Traceability and Reliability

XS solutions are traceable to the IUPAC pH scale through an unbroken chain of comparisons directly to NIST Standard Reference Materials. Each solution is accompanied by the Certificate of Analysis from Giorgio Bormac's in-house laboratory, which ensures quality, traceability, and accuracy. You can download the certificate directly from the website at giorgiobormac.com.

Everyday use

This pH 4.01 buffer solution is ideal for everyday use in checking sensors and your calibrations. Thanks to its high precision and certified traceability, you can be sure of always obtaining accurate and reliable measurements.

Why choose GIORGIO BORMAC pH 4.01 buffer solution?

• High precision: With an accuracy of ± 0.02, this solution guarantees precise measurements.


• N.I.S.T certification: Each bottle comes with a certificate that can be downloaded for free, ensuring the product's traceability and quality.


• Ease of use: The dispensing bottle with built-in calibration compartment makes calibration quick and easy.

Chemical composition

The buffer solution is composed of potassium hydrogen phthalate and potassium chloride, substances that ensure the solution's stability and reliability over time.

Practical packaging

The 250 ml package with integrated calibration compartment is designed to facilitate everyday use and reduce waste, making the calibration of your pH measuring instruments a simple and efficient operation.

Choose the pH buffer solution for calibration - XS Basic pH 4.01 /25°C (red) - 250 ml by GIORGIO BORMAC to ensure maximum precision and reliability in your pH measurements.