2-Mercaptoethansulfonsure

Bezeichnung:2-Mercaptoethansulfonsure

CAS-Nr3375-50-6

Englisch Name:2-Mercaptoethanesulfonic acid

CBNumberCB8186041

SummenformelC2H6O3S2

Molgewicht142.2

MOL-Datei3375-50-6.mol

Synonyma

2-Mercaptoethansulfonsure

2-Mercaptoethansulfonsure physikalisch-chemischer Eigenschaften

Dichte	1.25 g/mL at 20 °C
Löslichkeit	DMSO
Aggregatzustand	Powder
pka	pK1:;pK2:9.5(－1) (20°C)
BRN	1098878
CAS Datenbank	3375-50-6(CAS DataBase Reference)

Sicherheit

Kennzeichnung gefährlicher	C
R-Sätze:	34
S-Sätze:	26-27-36/37/39-45
RIDADR	UN 3265 8/PG 3
WGK Germany	2
F	10-23

Gefahreninformationscode (GHS)

2-Mercaptoethanesulfonic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Originator
Mistabronco,UCB,W. Germany,1973
Definition
ChEBI: An organosulfonic acid consisting of sulfonic acid having a 2-mercaptoethyl group attached to sulfur.
Manufacturing Process
2,100 g of β-S-thiuronium ethanesulfonate were placed in a solution of 2,100 cc of concentrated aqueous ammonia and 400 cc of water. The mixture was carefully warmed on a steam bath and an exothermic reaction ensured, at which point the β-S-thiuronium ethanesulfonate passed into solution. After standing for two hours at room temperature, the solution was concentrated until all of the excess ammonia had been removed.
The resultant clear solution from the ammonolysis reaction was processed through "Amberlite IR-120" ion exchange resin and converted into β-Smercaptoethanesulfonic acid in 93.7% yield (based on β-S-thiuronium ethanesulfonate).
It is expedient not to heat the reaction mixture rapidly since this increases the loss of ammonia and effects an incomplete reaction. Heating the mixture too rapidly may retard the ammonolysis reaction entirely. The amount of ammonia used is considered to be a satisfactory minimum and larger quantities of ammonia are not found to have any beneficial effect on the reaction. It is also expedient to remove the excess ammonia before processing the guanidinium β-mercaptoethanesulfonate solution through the ion exchange resin since the resin will also remove the ammonia with the result that the capacity of the resin for the exchange of guanidinium ions will be reduced.
Although the preparation of β-mercaptoethanesulfonic acid through the ammonolysis reaction is the preferred method, it is also possible to prepare the sulfonic acid by the sodium hydroxide hydrolysis of β-S-thiuronium ethanesulfonate followed by the ion exchange treatment. The resulting acid, however, is generally not as satisfactory as that prepared by the ammonolysis reaction.
Therapeutic Function
Mucolytic
Synthesis Reference(s)
Journal of the American Chemical Society, 77, p. 6231, 1955 DOI: 10.1021/ja01628a052

2-Mercaptoethanesulfonic acid Upstream-Materialien And Downstream Produkte

2-Mercaptoethansulfonsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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