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TES Free Acid


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Catalog #T2900
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 Number7365-44-8
Molecular FormulaC6H15NO6S
Molecular Weight229.25
AppearanceWhite 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 Capacity6.8-8.2
Alternate namesN-[tris-hydroxymethyl]methyl-2-aminoethanesulfonic acid

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