TES free acid is a structural analogue to Tris buffer. It is one of the ethanesulfonic acid series of biological buffers developed by Good et al. Good's midrange pKa, maximum water solubility and minimum solubility in all other solvents, minimal salt effects, minimal change in pKa with temperature, chemically and enzymatically stable, minimal absorption in visible or UV spectral range, and easily synthesized. TES probably exists in solution as a zwitterion. References:

纯度：≥98%

CAS：7365-44-8