TES is used to make buffer solutions. TES has a pKa value of 7.550 (at 25°C). TES can be used to make buffer solutions in the pH range 6.8-8.2[1].
[1]. Itagaki A, et al. Tes and HEPES buffers in mammalian cell cultures and viral studies: problem of carbon dioxide requirement. Exp Cell Res. 1974 Feb;83(2):351-61.
















