Tris(hydroxymethyl)aminomethane (Tris Base, CAS No. 77-86-1) is one of the most widely used biological buffering agents in biochemical, molecular biology, pharmaceutical, and life science research.
With a pKa of approximately 8.1 at 25°C, Tris provides effective buffering capacity in the physiological pH range and is commonly used to prepare Tris buffers, including Tris-HCl, TBS (Tris-buffered saline), TAE, and TBE electrophoresis buffers.
Due to its excellent water solubility, low biological toxicity, and stable buffering performance, Tris Base is extensively applied in DNA/RNA research, protein electrophoresis, molecular cloning, enzyme assays, pharmaceutical formulations, and biochemical analysis.
The molecular structure contains:
This structure enables:
Tris functions through the equilibrium:
Tris + H⁺ ⇌ Tris-H⁺
This reversible proton exchange allows effective control of pH in biological systems.
Tris Base is a fundamental reagent in molecular biology laboratories.
Applications include:
Tris maintains stable pH conditions required for nucleic acid stability and enzymatic activity.
Tris is widely used in electrophoresis buffer systems.
Applications include:
It provides stable pH conditions for separation and analysis of proteins and nucleic acids.
Tris buffers are commonly used in protein-related experiments.
Applications include:
Tris is used as a buffering component in pharmaceutical research.
Applications include:
Trometamol (Tris) is also used clinically as a buffering agent in certain pharmaceutical formulations.
Tris-based buffers support various biological experiments.
Applications include:
A: Tris Base (Tris(hydroxymethyl)aminomethane, CAS No. 77-86-1) is a biological buffer reagent widely used for maintaining stable pH conditions in biochemical experiments.
A: Tris Base is mainly used for:
| Property | Tris Base | Tris-HCl |
|---|---|---|
| Chemical Form | Free base | Hydrochloride salt |
| CAS No. | 77-86-1 | 1185-53-1 |
| pH Adjustment | Requires acid addition | Pre-adjusted acidic form |
| Main Use | Buffer preparation | Ready-made Tris buffer systems |
A: Tris provides stable buffering near physiological pH, has low biological interference, and is compatible with nucleic acid and protein experiments.
A: Tris buffer is generally effective around pH 7.0–9.0, with maximum buffering capacity near pH 8.1.
A: Yes. Tris-based buffers are commonly used in PCR systems to maintain suitable pH conditions for DNA polymerase activity.
A: Yes. Tris is a key component of SDS-PAGE, TAE, and TBE electrophoresis buffer systems.
A: Tris Base is dissolved in water and adjusted to the desired pH using hydrochloric acid or another suitable acid before use.
