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
CAS Number	29915-38-6 Y
ChemSpider	108495 N
Jmol 3D model	Interactive image
PubChem	121591
InChI InChI=1S/C7H17NO6S/c9-4-7(5-10,6-11)8-2-1-3-15(12,13)14/h8-11H,1-6H2,(H,12,13,14) N Key: YNLCVAQJIKOXER-UHFFFAOYSA-N N InChI=1/C7H17NO6S/c9-4-7(5-10,6-11)8-2-1-3-15(12,13)14/h8-11H,1-6H2,(H,12,13,14) Key: YNLCVAQJIKOXER-UHFFFAOYAP
SMILES C(CNC(CO)(CO)CO)CS(=O)(=O)O
Properties
Chemical formula	C7H17NO6S
Molar mass	243.28 g/mol
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

TAPS is used to make buffer solutions. It has a pK_a value of 8.44 (ionic strength I=0, 25°C). 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. Binds Co(II), Ni(II).