Buffer Solution pH 5 (Phthalate) – 500ml

Buffer Solution pH 5 (Phthalate) is a ready‑prepared weakly acidic buffer solution supplied in a convenient 500ml bottle, ideal for use in school and college science laboratories. Carefully formulated to maintain a stable pH of approximately 5, this solution provides consistent and reliable conditions for experiments requiring controlled acidity.

This buffer solution does not have an individual CAS or UN number (CAS: n/a, UN: NR) as it is a formulated mixture rather than a single chemical substance. The phthalate buffering system resists changes in pH when small quantities of acid or alkali are added, making it especially useful for accurate and repeatable educational experiments.

Supplied pre‑made and clearly labelled, this buffer saves preparation time for technicians and supports safe, efficient laboratory practice in educational settings.

Key Features

• Phthalate‑based buffer solution
• Maintains a stable pH of 5
• Pack size: 500ml
• UN No: NR
• CAS No: n/a (prepared buffer solution)
• Supplied ready to use with no preparation required
• Clearly labelled for safe handling and easy identification
• Designed for routine use in educational laboratories

Ideal for School Science Lessons

Buffer Solution pH 5 (Phthalate) is well suited to GCSE and A Level chemistry and biology lessons, where maintaining controlled pH conditions is essential for meaningful and repeatable results.

• Demonstrating the principles of buffer solutions
• Supporting lessons on acids, pH, and pH stability
• Calibrating and checking pH meters and probes
• Investigating the effect of pH on enzyme activity
• Providing consistent acidic conditions for comparative experiments

Reliable, easy to use, and curriculum aligned, Buffer Solution pH 5 (Phthalate) supports high‑quality practical science, helping students develop a strong understanding of pH control and buffering action while working safely in the laboratory.