Buffer Solution pH 4 (Phthalate) – 500ml

This high‑quality pH 4 Buffer Solution (Phthalate) is supplied in a 500ml bottle and provides a stable, ready‑to‑use calibration solution for use in school science laboratories. With no UN classification (NR) and no assigned CAS number, this buffer is suitable for safe, routine handling in educational environments.

pH 4 buffer solutions are essential for ensuring accurate calibration of pH meters, probes, and sensors used in chemistry and biology practicals. Formulated using a phthalate buffering system, this solution offers excellent stability and consistency—ideal for reliable, repeatable measurements across a wide range of experiments.

Key Features

• High‑quality pH 4 Phthalate Buffer Solution
• Supplied in a 500ml laboratory bottle
• Provides a stable, accurate calibration reference at pH 4
• UN Number: NR (non‑regulated)
• Ideal for calibrating pH meters, sensors, and dataloggers
• Reliable, consistent performance for routine classroom use

Ideal for School Science Lessons

This pH 4 buffer is widely used across KS3, GCSE, and A‑Level science, especially in experiments that require accurate pH measurement and calibration.

• Essential for calibrating pH meters before practical investigations
• Useful in experiments exploring acids, buffers, and pH control
• Supports accurate measurements in titrations and neutralisation