Magnesiumthiosulfat

Bezeichnung:Magnesiumthiosulfat

CAS-Nr10124-53-5

Englisch Name:Magnesium thiosulfate hexahydrate

CBNumberCB8200741

SummenformelH4MgO3S2

Molgewicht140.45

MOL-Datei10124-53-5.mol

Synonyma

Magnesiumthiosulfat

Magnesiumthiosulfat physikalisch-chemischer Eigenschaften

Schmelzpunkt	1700°C
Dichte	1.818
Wasserlöslichkeit	g/100g solution H2O: 30.69 (0°C), 34.51 (28°C); solid phase, MgS2O3 · 6H2O [KRU93]; insoluble alcohol [MER06]
Merck	14,5694
CAS Datenbank	10124-53-5(CAS DataBase Reference)
EPA chemische Informationen	Thiosulfuric acid (H2S2O3), magnesium salt (1:1) (10124-53-5)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36
WGK Germany	3
RTECS-Nr.	XN6550000
Toxizität	mouse,LD50,subcutaneous,850mg/kg (850mg/kg),Arzneimittel-Forschung. Drug Research. Vol. 5, Pg. 376, 1955.

Gefahreninformationscode (GHS)

Magnesium thiosulfate hexahydrate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
Magnesium thiosulfate has the molecular formula of MgS₂O₃ and the molecular weight of 136.4352 g/mol. It is also known as “hyposulfite”. It can be prepared by the reaction of sodium thiosulfate upon the chloride in water:
MgCl2+Na2S2O3? MgS2O3+2NaCl
Since magnesium thiosulfate is soluble in water (50 g/100 ml at 20°C), the solution must be evaporated at a low temperature to crystallize the product (salt-out temperature ～15°F (-9.4°C). A hexahydrate, MgS₂O₃· 6H₂O, is the result.
These are colorless crystals that lose water at 170°C to form the trihydrate. Further heating to 420°C then forms the anhydrate. Further heating to 600°C will cause the production of magnesium sulfate, sulfur and oxides of sulfur:
2MgS2O3+2O2+heat? 2MgSO4+S+SO2 Magnesium thiosulfate is considered to have a low toxicity to humans. It has been used to remove ozone from either a water stream, such as a drinking water or wastewater stream being treated with ozone, or scrubbing ozone from a gaseous stream by contacting the gaseous stream with solid magnesium thiosulfate. It has also been used to remove chlorine gas from a water stream by contacting the stream with magnesium thiosulfate solution. In yet another aspect, a method of scrubbing chlorine from a gaseous stream comprises contacting the gas stream with solid magnesium thiosulfate.
Magnesium thiosulfate is not commonly referenced in scientific literature. The few articles that prevail discuss technically specific physical properties of the end product itself. Synthetic methods are described in some Japanese patents and there is mention of MgTS in a short German description in Handbuch der Anorganischen Chemie, vol. 11, 1984. Both refer to adding sulfur to magnesium sulfite to produce magnesium thiosulfate. Neither reference describes the pH nor physical consistency of the “sulfite” intermediate, although the German article does note the “color change” observed as SO₂ is purged into MgO: the slurry becomes yellow.
Chemische Eigenschaften
colorless or white crystal(s) [MER06]

Magnesiumthiosulfat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

10124-53-5, Magnesium thiosulfate hexahydrate Verwandte Suche:

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