What is Tris buffer used for?

Tris is used to maintain stable pH in many biological and biochemical applications, such as electrophoresis, molecular assays, enzyme reactions, and nucleic acid work.

What pH range does Tris buffer cover?

Tris buffers effectively between about pH 7.0 and 9.0, with its best buffering around pH ~8.1 at 25 °C.

Does temperature affect Tris buffer?

Yes, the pH of Tris buffer changes with temperature, so it’s ideal to prepare and measure it at the temperature where it will be used.

Tris | Boston BioProducts

Tris (tris[hydroxymethyl]aminomethane) is a widely used biological buffer that helps maintain stable pH in the near‑neutral to mildly alkaline range. It is one of the most common buffers in biochemical and molecular biology research because it provides reliable pH control for many laboratory workflows.

Effective buffering range: ~pH 7.0–9.0 (pKa ~8.1 at 25 °C)
Helps regulate pH in enzyme and nucleic acid assays
Highly soluble and easily adjustable by acid/base
Commonly prepared as Tris‑HCl buffer for biological use
Compatible with many protein and DNA applications

Tris buffer is commonly used in gel electrophoresis, DNA/RNA extraction, protein assays, enzyme reactions, and other lab techniques requiring consistent pH near neutrality.

Tris

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