C6H13NO4S
195.24 g/mol
Research ReagentWarning
4-Morpholineethanesulfonic acid
CAS4432-31-9EC224-632-3
Category
Research Reagent
Compound Class
Organic Acid
Primary Use
Research Compound
4-Morpholineethanesulfonic acid, also known as MES, is an organosulfonic acid commonly used as a biological buffer. It is the conjugate acid of 2-(N-morpholino)ethanesulfonate and exists in equilibrium with its tautomer.
Biological buffer in research and laboratory settings
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongSame Parent
2-(N-Morpholino)ethanesulfonic acid hemisodium salt
CAS117961-21-4
research compound
StrongSame Parent
MES monohydrate
CAS145224-94-8
research compound
SimilarStructure SimilarSimilarity 0.81
3-(N-morpholino)propanesulfonic acid
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research compound
ApplicationSame Use
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research compound
ApplicationSame Use
N-(tris(hydroxymethyl)methyl)-3-amino-2-hydroxypropanesulfonic acid
CAS68399-81-5
research compound
ApplicationSame Use
3-(cyclohexylamino)propanesulfonic acid
CAS1135-40-6
research compound
ReferenceSame Category
2-(3-carboxy-2-pyridinyl)-3-pyridinecarboxylic acid
CAS4433-01-6
research compound
ReferenceSame Category
3-Oleoylestrone-2,4,16,16-D4
CAS443791-75-1
research compound
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-Morpholineethanesulfonic acid (CAS 4432-31-9) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
2-morpholin-4-ylethanesulfonic acid
InChIKey
SXGZJKUKBWWHRA-UHFFFAOYSA-N
SMILES
C1COCCN1CCS(=O)(=O)O
Synonyms (28)
- MES
- 1a7t
- MES (buffering agent)
- MES compound
- Morpholineethanesulfonic acid
- Morpholino-N-ethylsulfonate
- Morpholinoethanesulfonic acid
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