TAPS (buffer)

TAPS (buffer)
Names
IUPAC name
3-[[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]amino]propane-1-sulfonic acid
Other names
N-Tris(hydroxymethyl)methyl-3-aminopropanesulfonic acid
Identifiers
29915-38-6 YesY
3D model (Jmol) Interactive image
ChemSpider 108495 N
ECHA InfoCard 100.045.398
PubChem 121591
Properties
C7H17NO6S
Molar mass 243.28 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

TAPS is used to make buffer solutions. It has a pKa value of 8.44 (ionic strength I=0, 25 °C).[1] It can be used to make buffer solutions in the pH range 7.7–9.1.

The pH (and pKa at I≠0) of the buffer solution changes with concentration and temperature, and this effect may be predicted using online calculators. [2] Binds Co(II), Ni(II). [3]

References

  1. Goldberg, R.; Kishore, N.; Lennen, R. (2002). "Thermodynamic Quantities for the Ionization Reactions of Buffers" (PDF). J. Phys. Chem. Ref. Data. 31: 231–370. doi:10.1063/1.1416902.
  2. "Biological buffers". REACH Devices.
  3. Machado, C. M. M.; Gameiro, P.; Soares, H. M. (2008). J. Solution Chem. 37 (5): 603–617. Missing or empty |title= (help)
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