Horiba pH 4.01 Buffer Solution 500 mL (500‑4)

Horiba pH 4.01 Buffer Solution 500 mL (500‑4)

The Horiba pH 4.01 Buffer Solution 500 mL (Model 500-4) provides a stable, ready-to-use calibration standard at pH 4.01 ±0.02 at 25 °C, formulated for precise pH meter calibration and verification in laboratory and industrial environments.

Horiba prepares this buffer solution to help users establish a known reference point in the acidic pH range, supporting accurate calibration of benchtop, handheld, and portable pH instruments. Because the solution comes fully formulated, you can calibrate meters quickly and consistently, reducing preparation time and minimizing user error.

Professionals rely on Horiba buffer solutions to maintain measurement accuracy and reproducibility in water quality analysis, research labs, quality control departments, educational facilities, and environmental monitoring settings.

Key Features

• Standard pH 4.01 buffer solution calibrated at 25 °C ±0.02

• Ready to use — no dilution or mixing required

• Supports acidic range pH meter calibration

• Helps ensure accurate and reproducible measurements

• Suitable for laboratory, industrial, and field pH calibration tasks

• Packaged in a 500 mL bottle for convenient use

• Meets Horiba’s quality formulation standards

Technical Specifications

• Product type: pH buffer solution

• pH value: 4.01 at 25 °C ±0.02

• Volume: 500 mL

• Model code: 500-4

• Formulation: Ready-to-use calibration standard

Applications

• Calibration of pH meters in acidic range

• Routine instrument verification and quality control

• Environmental and water analysis calibration

• Research and educational laboratory use

• Industrial pH measurement calibration