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Name	4-Morpholineethanesulfonic acid	EINECS	224-632-3
CAS No.	4432-31-9	Density	1.349 g/cm³
PSA	75.22000	LogP	0.22510
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	N/A
Transport Information	N/A	Appearance	White/clear crystalline powder
Safety	26-36-24/25-22	Risk Codes	36/37/38
Molecular Structure		Hazard Symbols	Xi
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;	Article Data	9

4-Morpholineethanesulfonic acid Synthetic route

: 110-91-8
morpholine

: 3039-83-6
sodium vinylsulfonate

: 4432-31-9
4-morpholineethanesulfonic acid

Conditions

Conditions	Yield
In water at 60℃; for 6h; Large scale;	85%

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

: 4432-31-9
4-morpholineethanesulfonic acid

Conditions

Conditions	Yield
With tetrabutyl ammonium fluoride In tetrahydrofuran at 20℃; for 48h;	72%

: 3240-94-6
N-(2-chlorethyl)morpholine

: 4432-31-9
4-morpholineethanesulfonic acid

Conditions

Conditions	Yield
With water; sodium sulfite

: 4432-31-9
4-morpholineethanesulfonic acid

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

: 7732-18-5
water

: silver carbonate

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

Conditions

Conditions	Yield
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%

: 4432-31-9
4-morpholineethanesulfonic acid

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

: silver carbonate

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

Conditions

Conditions	Yield
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%

: 4432-31-9
4-morpholineethanesulfonic acid

A: 110-91-8
morpholine

B: 32797-12-9
2-oxo-ethanesulfonic acid

Conditions

Conditions	Yield
With (batho)2CuII (batho = 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolinedisulfonate); water at 25℃; for 24h; Rate constant; pH 8;

: 20138-79-8
benzo[c][1,2,5]thiadiazole-4,7-dicarbonitrile

: 4432-31-9
4-morpholineethanesulfonic acid

A: C8H2N4S(1-)

B: C6H12NO4S*H(1+)

Conditions

Conditions	Yield
With cetyltrimethylammonim bromide In water Mechanism; Irradiation; electron transfer in presence of micelles or bilayers;

: 4432-31-9
4-morpholineethanesulfonic acid

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

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

Conditions

Conditions	Yield
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;

: 4432-31-9
4-morpholineethanesulfonic acid

: 103654-84-8
2-morpholinoethanesulfonyl chloride

Conditions

Conditions	Yield
With oxalyl dichloride In dichloromethane at 0℃;

: 4432-31-9
4-morpholineethanesulfonic acid

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

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: oxalyl dichloride / dichloromethane / 0 °C 2: triethylamine / dichloromethane / 18 h / 20 °C View Scheme

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: Irritant Xi
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 NO_x and SO_x.

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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