MES Sodium Salt

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Sigma-Aldrich® MES Sodium Salt Physical Properties
Synonyms	2-(N-Morpholino)ethanesulfonic acid sodium salt 4-Morpholineethanesulfonic acid sodium salt
Molecular Formula	C₆H₁₂NNaO₄S	Beilstein Registry	3765682	Useful pH range	5.5 - 6.7
Molecular Weight	217.22	MDL Number	MFCD00065473	pKa (at 25)	6.1
CAS Number	71119-23-8	EG/EC Number	275-203-2

Sigma-Aldrich MES Sodium Salt Specifications Comparison
	M3885	M5057	M3058
Grade	≥99% (titration)	≥99% (titration)	BPC
Purity	≥99%	≥99%	≥99%
Reagent Testing
	M3885	M5057	M3058
Enhanced Quality Profile Buffers	X	X	X
260NM		<0.05	<0.05
280NM		<0.03	<0.03
290NM	≤0.1	≤0.1	≤0.1
IR		X	X
pH		8.9 - 10.1	8.9 - 10.1
Karl Fischer	≤8%	≤8%	≤8%
Life Science Testing
	M3885	M5057	M3058
Synthetic		X
Endotoxin			≤0.1 eu/mg
SPC			≤100 cfu/g
Cell test			X
RNAse			X
DNAse			X
Nickase			X
Protease			X
Lead(Pb)	≤0.0005%	≤0.0005%	≤0.0005%

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