2-Hydroxyethanesulfonic acid

A.gllsethionates. These are among the oldest of the synthetic detergents and were developed ia Germany to overcome problems of hard water. They are prepared by reaction of fatty acid chlorides with a salt of isethionic acid, ie, 2-hydroxyethanesulfonic acid [107-36-8]. These detergents have moderate foaming properties and have seen only limited use ia shampoos. 

C N 4-[2-[4-(aminoiminomethyl)phenylJethenyl]-3-hydroxybenzenecarboximidamide compd. with 2-hydroxyethanesulfonic acid (1 2)... 

The complexometric titrations were performed at the natural pH values of the ground-water samples and also at pH 7.0 and 6.0. The pH was buffered using HEPES (N-2-Hydoxyethylpiperazine-N -2-hydroxyethanesulfonic acid), PIPES (piperazine-N-N -bis[2-ethanesulfonic acid], or MES (2-[N-Morpholino]ethanesulfonic acid), which have PK3 values of 7.5,... 

Empirical C20H26N4O2 Properties M.w. 354.45 Uses Preservative in cosmetics Hexamidine diisethionate CAS 659-40-5 EINECS/ELINCS 211-533-5 Synonyms 2-Hydroxyethanesulfonic acid, compd. with 4,4 -[hexane-1,6-diylbis (oxy)] bis [benzenecarboxamidine] (2 1)... 

Hydroxyethanesulfonic acid, sodium salt. See Sodium isethionate 2-Hydroxy-1-ethanethiol. See2-Mercaptoethanol... 

Sodium 2-hydroxyethanesulfonate Sodium 2-hydroxyethanesulfonic acid. See Sodium isethionate... 

CAS 1562-00-1 EINECS/ELINCS 216-343-6 Synonyms 2-Hydroxyethanesulfonic acid, sodium salt Sodium 2-hydroxyethanesulfonate Sodium 2-hydroxyethanesulfonic acid Classification Organic salt Empirical C2H5O4S Na Formula H0CH2CH2S03Na... 

In a similar way, the fatty acid can be attached to 2-hydroxyethanesulfonic acid, thus forming an ester instead of an amide. The sodium salt is the so-called sodium isethionate (2). 

A partial solution to the problem of difunctional reactivity of alkoxy sulfonate nucleophiles during the macromolecular substitution of PDCP was proposed by Ganapathiappan et al. [25] and is presented in Fig. 5. Here the disodium salt of 2-hydroxyethanesulfonic acid is reacted with an excess of linear PDCP in the presence of a phase-transfer catalyst. A partially substituted, crosshnked semi-product is obtained, which is then treated with another nucleophile, the monofunctional sodium salt of 2-(2-methoxyethoxy)ethanol, to displace the sulfonate groups and chlorines attached to phosphorous atoms. It was found that the amount of sulfonate groups incorporated into the polyphosphazene was generally 50% of that initially used in the reaction mixture. 

Fig. 5 Direct synthesis of suifonated polyphosphazene using disodium salts of 2-hydroxyethanesulfonic acid and 2-(2-methoxyethoxy)ethanol...

FIGURE 7.19 Direct synthesis of sulfonated polyphosphazene with disodium salt of 2-hydroxyethanesulfonic acid. (Reprinted with permission from Ganapathiappan, S., Chen, K., and Shriver, D.F., A new class of cation conductors Polyphosphazene sulfonates. Macromolecules, 21, 2299. Copyright 1988 American Chemical Society.)... 

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