Dinatriumsulfid

Bezeichnung:Dinatriumsulfid

CAS-Nr1313-82-2

Englisch Name:Sodium sulfide

CBNumberCB3429046

SummenformelNa2S

Molgewicht78.04

MOL-Datei1313-82-2.mol

Synonyma

Dinatriumsulfid

Natriummonosulfid

Dinatriumsulfd

Dinatriumsulfid physikalisch-chemischer Eigenschaften

Schmelzpunkt	950 °C(lit.)
Dichte	1.86 g/mL at 25 °C(lit.)
storage temp.	Refrigerator (+4°C)
Löslichkeit	H₂O: 0.1 g/mL, clear, colorless
Aggregatzustand	flakes
Wichte	1.856
Farbe	Yellow
Wasserlöslichkeit	186 g/L (20 ºC)
Sensitive	Hygroscopic
Merck	14,8681
Dielectric constant	5.0（Ambient）
Stabilität	Spontaneously flammable. Incompatible with acids, metals, oxidizing agents. Contact with acid liberates toxic gas. Fine dust/air mixtures are explosive. Hygroscopic.
InChIKey	CXPWOVUZRAFMDA-UHFFFAOYSA-N
CAS Datenbank	1313-82-2(CAS DataBase Reference)
NIST chemische Informationen	Sodium sulfide(1313-82-2)
EPA chemische Informationen	Sodium sulfide (1313-82-2)

Sicherheit

Kennzeichnung gefährlicher	C,N,Xn
R-Sätze:	31-34-50-22
S-Sätze:	26-45-61-36/37/39
RIDADR	UN 1849 8/PG 2
WGK Germany	2
RTECS-Nr.	WE1905000
F	3-8-9-23
TSCA	Yes
HazardClass	4.2
PackingGroup	II
HS Code	28301010
Giftige Stoffe Daten	1313-82-2(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Sodium sulfide Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
WEISSE BIS GELBE HYGROSKOPISCHE KRISTALLE MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Zersetzung beim Verbrennen, bei Kontakt mit Säurenoder Wasser unter Bildung giftiger und ätzender Gase. Erhöhte Feuergefahr. Starke Base in wässriger Lösung. Reagiert sehr heftig mit Säuren. ätzend. Reagiert sehr heftig mit Oxidationsmitteln.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Eine gesundheitsschädliche Partikelkonzentration in der Luft kann beim Dispergieren schnell erreicht werden.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz verätzt die Augen, die Haut und die Atemwege. ätzend beim Verschlucken.
LECKAGE
Zündquellen entfernen. Verschüttetes Material mit trockener Erde oder Sand abdecken. Verschüttetes Material in Behältern sammeln. Reste sorgfältig sammeln. An sicheren Ort bringen. NICHT in die Umwelt gelangen lassen. Chemikalienschutzanzug mit umgebungsluftunabhängigem Atemschutzgerät.
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
Sodium sulfide,Na2S, also known as sodium sulfuret,is an irritating, water-soluble, yellowish to reddish, deliquescent powder that melts at 1180°C (2156 °F). Sodium sulfide is used as a chemical intermediate and solvent,in conversion of wood into paper pulp, as a photographic and analytical reagent,as a source of sulfide,as a reducing agent,in organic reactions, as a depilatory, and in sheep dips.
Physikalische Eigenschaften
White cubic crystal; hygroscopic; density 1.856 g/cm3; melts at 1,172°C; soluble in water 18.6 g/100mL at 20°C and 39 g/100mL at 50°C; aqueous solutions strongly alkaline; slightly soluble in alcohol; insoluble in ether.
The pentahydrate consists of flat, shiny prismatic crystals; density 1.58 g/cm³; loses three water molecules at 100°C; melts at 120°C losing all water molecules; soluble in water and alcohol; aqueous solutions strongly alkaline; insoluble in ether.
The nonahydrate is a yellowish-white crystalline solid; tetragonal crystals; odor of hydrogen sulfide; the color changes on exposure to light and air, first turning to yellow and then becoming brownish-black, deliquescent; density 1.43 g/cm³; decomposes at about 50°C; very soluble in water; aqueous solution strongly alkaline; slightly soluble in alcohol; insoluble in ether.
Verwenden
Sodium sulfide (Na2S) is used in the dye industry, in the oxidation process of gold, lead, and cooper metal ores, as a sheep dip, and to process paper.
Verwenden
These yellow flakes were made by fusing sodium carbonate with sulfur. Soluble in water but less so in alcohol, sodium sulfide was lovingly called “stink” by those who used it for toning prints or intensifying negatives because of its sulfurous smell.
Verwenden
It is used for H2S therapy, to study its effect on the prevention of diabetes in animals.
Verwenden
used in sulfur dyes, used as reductant, mordant, floatation agent, depilatory for leather, digestion auxiliary in paper-making, and used in textile, pigment and rubber
Definition
ChEBI: A sulfide salt with formula Na2S. The pentahydrate and (particularly) the nonahydrate are also known. In gel form, sodium sulfide is used to soften toenails to assist in trimming (and so relive pain) of ingrowing toenails.
Definition
A yellow-red solid, Na₂S, formed by the reduction of sodium sulphate with carbon (coke) at elevated temperatures. It is a corrosive and readily oxidized material of variable composition and usually contains polysulphides of the type Na₂S₂, Na₂S₃, and Na₂S₄, which cause the variety of colours. It is known in an anhydrous form (r.d. 1.85; m.p. 1180°C) and as a nonahydrate, Na₂S·9H₂O (r.d. 1.43; decomposes at 920°C). Other hydrates of sodium sulphide have been reported. The compound is deliquescent, soluble in water with extensive hydrolysis, and slightly soluble in alcohol. It is used in wood pulping, dyestuffs manufacture, and metallurgy on account of its reducing properties. It has also been used for the production of sodium thiosulphate (for the photographic industry) and as a depilatory agent in leather preparation. It is a strong skin irritant.
synthetische
Sodium sulfide is prepared by heating sodium bisulfate with sodium chloride and coal above 950°C. The product mixture is extracted with water and the hydrated sulfide is obtained from the solution by crystallization: NaHSO₄ + NaCl + 2C → Na₂S + 2CO₂↑ + HCl↑
Sodium sulfide also is produced from its elements in liquid ammonia: Na + 2S → Na₂S.
Allgemeine Beschreibung
Sodium sulfide is a yellow to brick red crystalline mass or fused solid with an odor of rotten eggs. If exposed to moist air Sodium sulfide is liable to spontaneous heating and may cause ignition of nearby combustible material. Sodium sulfide absorbs moisture from the air.
Air & Water Reaktionen
Aqueous solutions of sodium sulfide when exposed to air slowly convert to sodium hydroxide and sodium thiosulfate. The crystalline form upon exposure to air forms hydrogen sulfide and sodium carbonate [Merck 11th ed. 1989].
Reaktivität anzeigen
SODIUM SULFIDE is a white to yellow crystalline material, flammable. Can explode on rapid heating or when shocked. Violent reaction with carbon, charcoal, diazonium salts, N,N-dichloromethylamine, strong oxidizers, water. On contact with acids Sodium sulfide liberates highly toxic and flammable hydrogen sulfide gas. When heated to decomposition Sodium sulfide emits toxic fumes of sodium oxide, and oxides of sulfur [Bretherick, 5th ed., 1995, p. 1729].
Hazard
Flammable, dangerous fire and explosion risk. Strong irritant to skin and tissue, liberates toxic hydrogen sulfide on contact with acids.
Health Hazard
Caustic action on skin and eyes. If ingested may liberate hydrogen sulfide in stomach.
Brandgefahr
Special Hazards of Combustion Products: Irritating sulfur dioxide is produced in fire.
Flammability and Explosibility
Non flammable
Industrielle Verwendung
In non-metallic flotation, sodium sulfide is also used as a depressant and for collector desorption, in particular, fatty acids from monazite, pyrochlore, zircon and microcline. As a depressant for quartz, sodium sulfide is an excellent depressant for iron-activated quartz as well as non-activated quartz.
Industrielle Verwendung
Sodium sulfide (Na2S·9H2O) is a hygroscopic substance with a specific gravity of 1.864 and a melting temperature of 1180 °C. The reagent is soluble in water. The aqueous solution of sodium sulfide has a highly alkaline reaction resulting from its hydrolysis: Na2S + H2O ? NaOH + NaHS
Sicherheitsprofil
A poison by ingestion and intraperitoneal routes. Flammable when exposed to heat or flame. Unstable and can explode on rapid heating or percussion. Reacts violently with carbon, diazonium salts, n,n-dichloromethylamine, onitroaniline diazonium salt, water. When heated to decomposition it emits toxic fumes of SOx and Na2O. See also SULFIDES
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.]

Sodium sulfide Upstream-Materialien And Downstream Produkte

Dinatriumsulfid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

1313-82-2, Sodium sulfide Verwandte Suche:

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