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Trizma® hydrochloride

BioPerformance Certified, suitable for cell culture, ≥99.0% (titration)

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TRIS HCl, TRIS hydrochloride, Tris(hydroxymethyl)aminomethane hydrochloride, Tromethane hydrochloride
Linear Formula:
NH2C(CH2OH)3 · HCl
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


BioPerformance Certified


≥99.0% (titration)


crystalline powder


DNA purification: suitable
cell culture | mammalian: suitable
electrophoresis: suitable
protein extraction: suitable


DNAse, Exonuclease; NICKase, Endonuclease; RNAse and Protease, none detected
endotoxin and total aerobic microbial count, tested
≤0.5% water (Karl Fischer)



useful pH range


pKa (25 °C)



150-152 °C


H2O: 667 mg/mL


1.39 g/cm3 at 20—25 °C
1.40 g/cm3 at 20—25 °C


≤0.05 at 290 at 40%


suitable for electrophoresis
suitable for immunohistochemistry
suitable for molecular biology


diagnostic assay manufacturing
general analytical
life science and biopharma
sample preparation

SMILES string




InChI key


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General description

Tris HCl, also known as Trizma® hydrochloride, is a widely used acidic buffer for preparing buffers within the physiological pH range of 7.3 to 7.5. With a pKa of 8.08 at 25°C, Tris HCl offers a pH range of 7.0 to 9.0, matching the typical pH of living organisms. As a result, Tris HCl is an essential component of buffer solutions used in various biological, cell culture, biochemistry, and molecular biology applications. It is important to note that neither Tris base nor Tris hydrochloride on their own can provide sufficient buffering capacity. Therefore, they are typically combined to create a buffer within the pH range of 7 to 9, ensuring effective pH control.

Tris buffers are indispensable in techniques like protein electrophoresis and western blotting. In many western blot protocols, a low ionic strength Tris buffer is employed for protein transfer. The transfer duration depends on the blotting apparatus and the size range of peptides under investigation. Tris-based buffers are also commonly used in SDS-PAGE gels, running buffers, and blotting buffers.

Furthermore, Tris salts find extensive use in DNA agarose electrophoresis, particularly in the preparation of buffers like TAE (Tris acetate/EDTA) and TBE (Tris borate/EDTA). These buffers play a pivotal role in various applications, including biochemistry, protein purification, and electrophoresis. Tris HCl is a versatile and essential for maintaining the pH of biological systems and ensuring the optimal performance of biochemical, cell culture, and molecular biology techniques.


Tris-HCl hasbenn used
  • as a washing and rinsing buffer in an immunohistochemical analysis(1)
  • as a component of reducing sample buffer, lysis buffer and elution buffer, in a biochemical research involving gel electrophoresis and BioLayer interferometry measurement(2)

Features and Benefits

  • Suitable for Molecular Biology and Cell Culture
  • Can be used as a Buffer component, for Electrophoresis and Protein separation
  • Tested for Endotoxins and Total Aerobic Microbial Count
  • Free from DNase, NICKase, RNase, and Protease
  • Tested to confirm low levels of heavy metal contamination, ensuring suitability for various applications
  • Effective Buffering from pH 7-9 (25 °C) with a pKa of 8.1 (25 °C)
  • Highly soluble in water


Each kit contains 3 x 100G samples, each sample from a uniquely manufactured lot.

Other Notes

For additional information on our range of Biochemicals, please complete this form.
The pH values of all buffers are temperature and concentration dependent. For Tris buffers, pH increases about 0.03 unit per °C decrease in temperature, and decreases 0.03-0.05 unit per ten-fold dilution. For precise applications, use a carefully calibrated pH meter with a glass/calomel combination electrode.

Legal Information

Trizma is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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