2-MORPHOLINOETHANESULFONIC ACID MONOHYDRATE

PRODUCT IDENTIFICATION

CAS NO. 145224-94-8

2-MORPHOLINOETHANESULFONIC ACID MONOHYDRATE 

EINECS NO.  
FORMULA C6H13NO4S·H2O
MOL WT. 213.25
H.S. CODE  
SMILES

 

TOXICITY  
SYNONYMS MES monohydrate; Morpholineethanesulfonic acid monohydrate;
2-(4-Morpholinyl)ethanesulfonic acid monohydrate; 2-(N-Morpholino)ethanesulfonic acid monohydrate; 2-Morpholinoethanesulfonic acid monohydrate; 4-Morpholinethanesulfonic acid monohydrate; Morpholino-N-ethylsulfonate monohydrate; Morpholinoethanesulfonic acid monohydrate;

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white crystalline powder
MELTING POINT >300 C (Decomposes)
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER Soluble
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT

 

STABILITY Stable under ordinary conditions. Hygroscopic.

GENERAL DESCRIPTION & APPLICATIONS

MES is one of a number of so-called "Good" buffers developed for biological applications, with the criteria: midrange pKa, maximum water solubility and minimum solubility in all other solvents, minimal salt effects, minimal change in pK with temperature, chemically and enzymatically stable, minimal absorption in visible or UV spectral range and reasonably easily synthesized. MES is not recommended for buffering at pH 7.4; other buffers should be considered (http://www.sigmaaldrich.com)

List of Good's buffers

SALES SPECIFICATION

APPEARANCE

white crystalline powder
ASSAY

99.0% min

pKa

6.1 (25C), 6.15 (20C)

WATER

10.0% max

pH

2.5 - 4.0 (0.5 M in H2O, 25 C)

USEFUL pH RANGE

5.5 - 6.7
TRANSPORTATION
PACKING 1kgs, 25kgs in fiber drum
HAZARD CLASS Not regulated
UN NO.

 

OTHER INFORMATION
Hazard Symbols: XI, Risk Phrases: 36/37/38, Safety Phrases: 26-36