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Specifications

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 Number	7365-44-8
Molecular Formula	C6H15NO6S
Molecular Weight	229.25
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
Alternate names	N-[tris-hydroxymethyl]methyl-2-aminoethanesulfonic acid