Product Name

  • Name

    4-Morpholineethanesulfonic acid

  • EINECS 224-632-3
  • CAS No. 4432-31-9
  • Article Data9
  • CAS DataBase
  • Density 1.349 g/cm3
  • Solubility 0.5 M at 20 °C in water, clear
  • Melting Point >300 °C(lit.)
  • Formula C6H13NO4S
  • Boiling Point 102°C
  • Molecular Weight 195.24
  • Flash Point
  • Transport Information
  • Appearance White/clear crystalline powder
  • Safety 26-36-24/25-22
  • Risk Codes 36/37/38
  • Molecular Structure Molecular Structure of 4432-31-9 (4-Morpholineethanesulfonic acid)
  • Hazard Symbols IrritantXi
  • Synonyms 2-(4-Morpholino)ethanesulfonicacid;2-(4-Morpholinyl)ethanesulfonic acid;2-(N-Morpholino)ethanesulfonicacid;2-Morpholinoethanesulfonic acid;MES;MES (buffering agent);Morpholinoethanesulfonic acid;NSC 157116;
  • PSA 75.22000
  • LogP 0.22510

Synthetic route

morpholine
110-91-8

morpholine

sodium vinylsulfonate
3039-83-6

sodium vinylsulfonate

4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

Conditions
ConditionsYield
In water at 60℃; for 6h; Large scale;85%
2-morpholin-4-yl-ethanesulfonic acid 4-(tert-butyldiphenylsilanyloxy)-2,2-dimethylbutyl ester

2-morpholin-4-yl-ethanesulfonic acid 4-(tert-butyldiphenylsilanyloxy)-2,2-dimethylbutyl ester

4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

Conditions
ConditionsYield
With tetrabutyl ammonium fluoride In tetrahydrofuran at 20℃; for 48h;72%
N-(2-chlorethyl)morpholine
3240-94-6

N-(2-chlorethyl)morpholine

4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

Conditions
ConditionsYield
With water; sodium sulfite
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

1,1'-(1,4-butanediyl)bis(2-ethylbenzimidazole)
1059536-95-6

1,1'-(1,4-butanediyl)bis(2-ethylbenzimidazole)

water
7732-18-5

water

silver carbonate

silver carbonate

[Ag(1,1'-(1,4-butanediyl)bis(2-ethylbenzimidazole))0.5(2-(N-morpholino)ethanesulfonate)]*H2O

[Ag(1,1'-(1,4-butanediyl)bis(2-ethylbenzimidazole))0.5(2-(N-morpholino)ethanesulfonate)]*H2O

Conditions
ConditionsYield
In ethanol; ammonia aq. NH3; Ag compd., acid, and ligand (1:2:1 molar ratio) in EtOH, stirred for 30 min, dissolved (aq. ammonia); crystd. on storage at room temp., elem. anal.;68%
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

1,1′-(1,4-butanediyl)bis(2-methylbenzimidazole)
1059536-93-4

1,1′-(1,4-butanediyl)bis(2-methylbenzimidazole)

silver carbonate

silver carbonate

[Ag(1,1'-(1,4-butanediyl)bis(2-methylbenzimidazole))0.5(2-(N-morpholino)ethanesulfonate)]

[Ag(1,1'-(1,4-butanediyl)bis(2-methylbenzimidazole))0.5(2-(N-morpholino)ethanesulfonate)]

Conditions
ConditionsYield
In ethanol; ammonia aq. NH3; Ag compd., acid, and ligand (1:2:1 molar ratio) in EtOH, stirred for 30 min, dissolved (aq. ammonia); crystd. on storage at room temp., elem. anal.;66%
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

A

morpholine
110-91-8

morpholine

B

2-oxo-ethanesulfonic acid
32797-12-9

2-oxo-ethanesulfonic acid

Conditions
ConditionsYield
With (batho)2CuII (batho = 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinedisulfonate); water at 25℃; for 24h; Rate constant; pH 8;
benzo[c][1,2,5]thiadiazole-4,7-dicarbonitrile
20138-79-8

benzo[c][1,2,5]thiadiazole-4,7-dicarbonitrile

4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

A

C8H2N4S(1-)

C8H2N4S(1-)

B

C6H12NO4S*H(1+)

C6H12NO4S*H(1+)

Conditions
ConditionsYield
With cetyltrimethylammonim bromide In water Mechanism; Irradiation; electron transfer in presence of micelles or bilayers;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

sodium anthraquinone-1,5-disulphonate
853-35-0

sodium anthraquinone-1,5-disulphonate

C14H8O8S2(2-)*2Na(1+)

C14H8O8S2(2-)*2Na(1+)

Conditions
ConditionsYield
With benzo[c][1,2,5]thiadiazole-4,7-dicarbonitrile; cetyltrimethylammonim bromide In water for 2.5h; Mechanism; Irradiation;
With benzo[c][1,2,5]thiadiazole-4,7-dicarbonitrile; dimethyldioctadecylammonium bromide In water for 2.5h; Mechanism; Irradiation;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

2-morpholinoethanesulfonyl chloride
103654-84-8

2-morpholinoethanesulfonyl chloride

Conditions
ConditionsYield
With oxalyl dichloride In dichloromethane at 0℃;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

2-[1-(3,4-dichlorophenyl)-1H-pyrazol-3-yloxy]ethyl 2-morpholinoethanesulfonate

2-[1-(3,4-dichlorophenyl)-1H-pyrazol-3-yloxy]ethyl 2-morpholinoethanesulfonate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: oxalyl dichloride / dichloromethane / 0 °C
2: triethylamine / dichloromethane / 18 h / 20 °C
View Scheme
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

1-ethyl-3-methylimidazolium hydroxide

1-ethyl-3-methylimidazolium hydroxide

C6H11N2(1+)*C6H12NO4S(1-)
1393375-77-3

C6H11N2(1+)*C6H12NO4S(1-)

Conditions
ConditionsYield
In water at 20℃; for 12h;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

tetramethyl ammoniumhydroxide
75-59-2

tetramethyl ammoniumhydroxide

C4H12N(1+)*C6H12NO4S(1-)
1612259-38-7

C4H12N(1+)*C6H12NO4S(1-)

Conditions
ConditionsYield
In water at 20℃; for 12h;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

tetraethylammonium hydroxide
77-98-5

tetraethylammonium hydroxide

C8H20N(1+)*C6H12NO4S(1-)
1612259-39-8

C8H20N(1+)*C6H12NO4S(1-)

Conditions
ConditionsYield
In water at 20℃; for 12h;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

tetra(n-butyl)ammonium hydroxide
2052-49-5

tetra(n-butyl)ammonium hydroxide

2-Morpholin-4-yl-ethanesulfonatetetrabutyl-ammonium;
113598-98-4

2-Morpholin-4-yl-ethanesulfonatetetrabutyl-ammonium;

Conditions
ConditionsYield
In water at 20℃; for 12h;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

cholin hydroxide
123-41-1

cholin hydroxide

cholinium 2-(N-morpholino)ethanesulfonate

cholinium 2-(N-morpholino)ethanesulfonate

Conditions
ConditionsYield
In aq. buffer for 12h;
4-morpholineethanesulfonic acid
4432-31-9

4-morpholineethanesulfonic acid

2-(morpholin-4-yl)ethane-1-sulfonyl chloride hydrochloric acid salt

2-(morpholin-4-yl)ethane-1-sulfonyl chloride hydrochloric acid salt

Conditions
ConditionsYield
With thionyl chloride In N,N-dimethyl-formamide at 75℃; for 3h;1.57 g

4-Morpholineethanesulfonic acid Chemical Properties

IUPAC Name: 2-Morpholin-4-ylethanesulfonic acid 
Molecular Formula of 2-Morpholinoethanesulfonic acid (CAS NO.4432-31-9): C6H13NO4S
Molecular Weight: 195.2367 
EINECS: 224-632-3
Molecular Structure:

Melting Point: >300 °C
ProductCategories: Pharmaceutical Raw Materials ; Biochemistry ; Good's Buffers ; Biotechnology Performance Certified (BPC) BuffersBiological Buffers ; Buffer Convenience Packaging ; Buffer SolutionsBiological Buffers ; Buffers A to ZBiological Buffers ; Good Buffers ; BioUltraBiological Buffers ; Buffer SolutionsProtein Structural Analysis ; AlphabeticalMolecular Biology ; Biological Buffers ; BioUltra Buffers ; Molecular Biology Reagents ; Optimization Reagents ; X-Ray Crystallography 
Polar Surface Area: 64.22 Å2
Index of Refraction: 1.516
Molar Refractivity: 43.75 cm3
Molar Volume: 144.6 cm3
Surface Tension: 49.6 dyne/cm
Density of 2-Morpholinoethanesulfonic acid (CAS NO.4432-31-9): 1.349 g/cm3

4-Morpholineethanesulfonic acid Uses

 2-Morpholineethanesulfonic acid(CAS NO.4432-31-9) is used for soap and soap in the soap dispersing agent for calcium. Can replace sodium tripolyphosphate as low phosphorus or phosphorus-free detergent. Can also be active in the liquid detergent in the matter. Industry as the bubble-type mineral flotation agent. Degreasing of leather, dyes, pigments, pesticides as dispersing agent, wetting agent. In the printing industry to make deinking agent.Be used as a facial cleanser, shampoo, bubble bath type agents, dishwashing detergents, hand-washing agent of raw materials, etc.

4-Morpholineethanesulfonic acid Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
quail LD50 oral > 316mg/kg (316mg/kg)   Ecotoxicology and Environmental Safety. Vol. 6, Pg. 149, 1982.

4-Morpholineethanesulfonic acid Consensus Reports

Reported in EPA TSCA Inventory.

4-Morpholineethanesulfonic acid Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25-22 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing. 
S24/25: Avoid contact with skin and eyes. 
S22: Do not breathe dust.
WGK Germany: 1
RTECS: QE9104530
A poison by ingestion. When heated to decomposition it emits toxic vapors of NOx and SOx.

4-Morpholineethanesulfonic acid Specification

 Synonyms of 2-Morpholinoethanesulfonic acid (CAS NO.4432-31-9) are 2-(4-Morpholinyl)ethanesulfonic acid ; 2-(N-Morpholino)ethanesulfonic acid ; 4-27-00-00370 (Beilstein Handbook Reference) ; 4-Morpholinethanesulfonic acid ; AI3-62517 ; Ethanesulfonic acid, 2-morpholino- ; MES ; MES (buffering agent) ; Morpholineethanesulfonic acid ; Morpholino-N-ethylsulfonate ; Morpholinoethanesulfonic acid . It is stable  but incompatible with strong oxidizing agents.

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