Sodium sulfide nonahydrate

Bezeichnung:Sodium sulfide nonahydrate

CAS-Nr1313-84-4

Englisch Name:Sodium sulfide nonahydrate

CBNumberCB1100945

SummenformelH2Na2OS

Molgewicht96.06

MOL-Datei1313-84-4.mol

Sodium sulfide nonahydrate physikalisch-chemischer Eigenschaften

Schmelzpunkt	50 °C
Siedepunkt	920°C
Dichte	1.427
storage temp.	2-8°C
Löslichkeit	Aqueous Acid (Slightly), Water (Sparingly)
Aggregatzustand	Solid
Farbe	colorless or slightly yellow
Wichte	1.427
Wasserlöslichkeit	180 G/L (25 ºC)
Sensitive	Hygroscopic
Merck	14,8681
Stabilität	Stable. Hygroscopic. Light-sensitive. Flammable. Avoid exposure to air, acids, oxidizers, strong bases, strong reducing agents, most common metals.
InChIKey	GDQBTRYKLOBMLL-UHFFFAOYSA-N
CAS Datenbank	1313-84-4(CAS DataBase Reference)
EPA chemische Informationen	Sodium sulfide (Na2S), nonahydrate (1313-84-4)

Sicherheit

Kennzeichnung gefährlicher	C,N,T
R-Sätze:	31-34-50-24-22
S-Sätze:	26-45-61-36/37/39
RIDADR	UN 1849 8/PG 2
WGK Germany	2
RTECS-Nr.	WE1925000
F	13
TSCA	Yes
HazardClass	8
PackingGroup	II
HS Code	28301010
Toxizität	mouse,LD50,intraperitoneal,53mg/kg (53mg/kg),Comptes Rendus Hebdomadaires des Seances, Academie des Sciences. Vol. 257, Pg. 791, 1963.

Gefahreninformationscode (GHS)

Sodium sulfide nonahydrate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R31:Entwickelt bei Berührung mit Säure giftige Gase.
R34:Verursacht Verätzungen.
R50:Sehr giftig für Wasserorganismen.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
colourless, white or yellow crystals with an odour of rotten eggs
Verwenden
It is the precursor material for preparation of cadmium sulfide quantum dots. Also employed in the pulp and paper industry. It is likewise employed in the making of colors and dyestuffs. It is too useful in the trace quantities for the rapid synthesis of small silver nanocubes through mediating polyol reduction. It has as a significant role in breaking up the feather keratin useful for the preparation of bio-polymer.
Verwenden
Sodium sulfide nonahydrate has been used as a source of H₂S, to study the effect of H₂S on amyloid fibrils associated with neurodegenerative diseases. It has been used in the preparation of sulfide standards for the quantitative analysis of sulfides in raw wastewater (sewage) samples.
It serves as a catalyst during synthesis of thioamides.
Verwenden
sodium sulphide nonahydrate has the following uses:sulfur dyestuff; leather depilatory;rayon denitration;dyeing auxiliary;sodium sulphide;including crystallization water; sodium sulphide or sulfureT;dyeing auxiliary.
Allgemeine Beschreibung
Sodium sulfide nonahydrate participates in the conversion of nitroxides to amines, via reduction.
läuterung methode
Some purification of the hydrated salt can be achieved by selecting large crystals and removing the surface layer (contaminated with oxidation products) by washing with distilled water. Other metal ions can be removed from Na2S solutions by passage through a column of Dowex ion-exchange A-1 resin, Na+-form. The hydrated salt can be rendered anhydrous by heating it in a stream of H2 or N2 until water is no longer evolved. (The resulting cake should not be heated to fusion because it is readily oxidised.) Recrystallise it from distilled water [Anderson & Azowlay J Chem Soc, Dalton Trans 469 1986]. Note that sodium sulfide hydrolyses in H2O to form NaHS + H2O, and is therefore alkaline. A 0.1N solution in H2O is 86% hydrolysed at room temperature. Its solubility in H2O is 8% at 0o, 12% at 20o and 30% at 50o. The anhydrous salt is obtained by allowing it to stand in a vacuum over conc H2SO4 or P2O5 at 45o to start with, then at 30-35o when the salt contains 4% of water. The last traces of water are removed by heating to 700o in a glass or porcelain tube in a stream of H2 to give pure H2S. [Fehér in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I pp 358-360 1963.]

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