trometamol

Trometamol, also known as tris(hydroxymethyl)aminomethane or Tris, is a weak organic base used primarily as a buffering agent in laboratory and medical contexts. Its chemical formula is C4H11NO3, and it exists in base form as well as conjugate acid salts such as Tris-HCl. The compound is a white crystalline solid and is highly soluble in water.

In the laboratory, trometamol is one of the most widely used buffers in biochemistry and molecular biology. It has a pKa near 8.07 at 25°C, which gives it buffering capacity around pH 7 to 9. Tris buffers are employed in a variety of applications, including protein assays, enzyme reactions, and gel electrophoresis, and can be prepared in different salt forms depending on the desired ionic strength and pH. It is common to adjust a Tris buffer with hydrochloric acid to achieve a specific pH or to use the free base form to minimize changes in pH upon dilution.

Medically, trometamol refers to tromethamine (THAM), a buffer used intravenously to treat metabolic acidosis. As a proton-accepting buffer, THAM helps neutralize excess acid without increasing CO2 production. It is typically used in emergency or critical care settings under close monitoring. THAM can affect electrolyte balance and acid-base status and is chosen based on patient condition and renal function.

Safety and handling notes indicate that trometamol is generally considered low toxicity when used as directed, but overdose or inappropriate administration can lead to metabolic alkalosis, electrolyte disturbances, or infusion-related reactions. It is available commercially as a laboratory buffer and as a pharmaceutical preparation for medical use.