MES (buffer)

MES
Names
	IUPAC names 2-morpholin-4-ylethanesulfonic acid ; Zwitterion: 2-morpholin-4-ium-4-ylethanesulfonate
	Other names 2-(N-morpholino)ethanesulfonic acid
Identifiers
CAS Number	4432-31-9 (free acid) ; 1266615-59-1 (hydrate) ; 145224-94-8 (monohydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:39005 ;
ChemSpider	70541 ;
ECHA InfoCard	100.022.394
PubChem CID	78165;
UNII	2GNK67Q0C4 ;
CompTox Dashboard (EPA)	DTXSID4063454 ;
	InChI InChI=1S/C6H13NO4S/c8-12(9,10)6-3-7-1-4-11-5-2-7/h1-6H2,(H,8,9,10) Key: SXGZJKUKBWWHRA-UHFFFAOYSA-N ; InChI=1/C6H13NO4S/c8-12(9,10)6-3-7-1-4-11-5-2-7/h1-6H2,(H,8,9,10) Key: SXGZJKUKBWWHRA-UHFFFAOYAP;
	SMILES C1COCCN1CCS(=O)(=O)O;
Properties
Chemical formula	C6H13NO4S
Molar mass	195.2 g/mol
Acidity (pKa)	6.15
	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

MES (2-(N-morpholino)ethanesulfonic acid) is a chemical compound that contains a morpholine ring. It has a molecular weight of 195.2 g/mol and the chemical formula is C₆H₁₃NO₄S. Synonyms include: 2-morpholinoethanesulfonic acid; 2-(4-morpholino)ethanesulfonic acid; 2-(N-morpholino)ethanesulfonic acid; 2-(4-morpholino)ethanesulfonic acid; MES; MES hydrate; and morpholine-4-ethanesulfonic acid hydrate. MOPS is a similar pH buffering compound which contains a propanesulfonic moiety instead of an ethanesulfonic one.