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 ;
3D model (JSmol)	Interactive image;
ChemSpider	98301 ;
ECHA InfoCard	100.063.611
PubChem CID	109334;
UNII	45Q4J0071U ;
CompTox Dashboard (EPA)	DTXSID80887356 ;
	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) Key: RZQXOGQSPBYUKH-UHFFFAOYSA-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). verify (what is ?) 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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[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.