TAPSO

TAPSO
Names

IUPAC name 3-[[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]amino]-2-hydroxypropane-1-sulfonic acid
Other names 3-[N-Tris(hydroxymethyl)methylamino]-2-hydroxypropanesulfonic acid
Identifiers
CAS Number	68399-81-5^Y
ChemSpider	98301^N
Jmol interactive 3D	Image
PubChem	109334
InChI InChI=1S/C7H17NO7S/c9-3-7(4-10,5-11)8-1-6(12)2-16(13,14)15/h6,8-12H,1-5H2,(H,13,14,15)^N Key: RZQXOGQSPBYUKH-UHFFFAOYSA-N^N InChI=1/C7H17NO7S/c9-3-7(4-10,5-11)8-1-6(12)2-16(13,14)15/h6,8-12H,1-5H2,(H,13,14,15) Key: RZQXOGQSPBYUKH-UHFFFAOYAF
SMILES O=S(=O)(O)CC(O)CNC(CO)(CO)CO
Properties
Chemical formula	C₇H₁₇NO₇S
Molar mass	259.28 g/mol
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

TAPSO is used to make buffer solutions. It has a pK_a value of 7.635 (I=0, 25°C).^[1] It can be used to make buffer solutions in the pH range 7.0-8.2.

References

↑ 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.

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