Technical Data
TES Free Acid
Biochemicals Storage: RTShipping: RT
TES is a biological buffer (zwitterionic) designed by Good, et al. Typically referred to as Good’s Buffer useful in cell culture media formulations. Selection of biological buffer systems should include the following criteria: exclusion by biological membranes, low absorption between 240-700nm, chemically stable, and stable to temperature and concentration changes.

CAS Number:

Molecular Formula:

Molecular Weight:
Purity: 99%

Appearance: White crystalline powder

Solubility (10%, H2O): Colorless, clear, complete

pH (1%): 3.5-5.0

Water (Karl Fisher): 0.1%

Absorbance (A280): 0.05
(0.1M, dH2O)

Absorbance (A260): 0.05
(0.1M, dH2O)

I.R.: Conform to Reference

pH Buffering Capacity: 6.8-8.2

pKa: 7.4
Good, N. E., et al., Biochemistry 5:467 (1966)

Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.