ISETHIONIC ACID

PRODUCT IDENTIFICATION
CAS NO. 107-36-8; 51694-03-2

ISETHIONIC ACID

EINECS NO. 203-484-3
FORMULA CH2OH·CH·SO2OH
MOL WT. 126.13

H.S. CODE

  

TOXICITY

  
SYNONYMS 2-Hydroxyethanesulfonic acid; (2-Hydroxyethyl)sulfonic acid;
2-Hydroxyethansulfonsäure (Dutch); ácido 2-hidroxietanosulfónico (Spanish); Acide 2-hydroxyéthanesulfonique (French); Ethanolsulfonic acid; Hydroxyethylsulfonic acid;

SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

liquid

MELTING POINT  
BOILING POINT 100 C
SPECIFIC GRAVITY

 

SOLUBILITY IN WATER

soluble

pH  
VAPOR PRESSURE  

REFRACTIVE INDEX

 

NFPA RATINGS

 Health: 2 ; Flammability: 0; Reactivity : 0

AUTOIGNITION

 

FLASH POINT

 

STABILITY Stable under ordinary conditions

GENERAL DESCRIPTION & APPLICATIONS
Isethionic acid, the ethyl chain sulfonic acid containing hydroxy group, is a water soluble, strongly acidic liquid; used in the manufacture of mild, biodegradable and high foaming anionic surfactants which provides gentle cleansing and soft skin feel. Isethionic acid is the trivial name for 2-hydroxyethanesulfonic acid which is the parent compound of sodium isethionate. Sodium isethionate is prepared by the reaction of ethylene oxide with sodium bisulfite solution. It is used as a key raw material in the manufacturing of Igepon type surfactants which are ethanesulfonated detergent bars. Igepon type surfactants include:

Product

CAS RN
N-Methyl-N-oleoyltaurine 97-80-3
Sodium N-methyl-N-oleoyltaurate 137-20-2
Sodium N-methyl-N-lauroyltaurine 4337-75-1
Sodium lauroyl isethionate 7381-01-3
Sodium N-methyl-N-cocoyltaurate 12765-39-8
Sodium cocoyl isothionate 61789-32-0
SALES SPECIFICATION

APPEARANCE

 liquid

CONTENT

80.0% min

TRANSPORTATION
PACKING 200kgs in drum
HAZARD CLASS

 

UN NO.

 

GENERAL DESCRIPTION OF IONIC SURFACTANTS

Ionic surfactants which contain hydrophobic hydrocarbon group connected with one or several hydrophilic groups dissociate into a positively charged cation and a negatively charged anion in an aqueous solution. If the head is negatively charged to carry the surface active properties, it is called anionic surfactant, whereas a positively charged head is the carrier of the surface active properties in cationic surfactants. Typically cationic surfactants are based on the nitrogen atom carrying the cationic charge such as amine and quaternary ammonium product.

Cationic surfactant is considered to be poor cleaners but it contributes to the fabric softening, the disinfecting properties, and the grease-water interfacial tension reducing. Cationic surfactants include quaternary ammonium compounds, amines (primary, secondary, tertiary, diamines, polyamines, amine salts), imidazoline compounds, betaine compounds, and esterquats.

Anionic surfactant is the widely used type of surface active agent for laundry detergents, liquid cleaners and shampoos due to excellent cleaning properties particularly effective at oily soil cleaning and oil/clay soil suspension. Anionic surfactants are deactivated in many hard water. To prevent deactivation, builders should be dosed. Anionic surfactant is used as a emulsifier in cosmetics, tooth paste, cream, shampoo, and acrylic binder. Common soap is an anionic surfactant. Carboxylate, sulfate, sulfonate and phosphate are the polar groups in anionic surfactants. Anionic surfactants include alkyl benzene sulfonate, fatty acid salts, sodium lauryl sulfate, alkyl sulfate salts, sodium lauryl ether sulfate, alpha-olefin sulfonates, phosphate esters, sulphosuccinates, alkyl phenol ether sulfates, and isethionates.