Calciumsulfid

Bezeichnung:Calciumsulfid

CAS-Nr20548-54-3

Englisch Name:CALCIUM SULFIDE

CBNumberCB3391370

SummenformelCaHS

Molgewicht73.15

MOL-Datei20548-54-3.mol

Synonyma

Calciumsulfid

Calciumsulfid physikalisch-chemischer Eigenschaften

Schmelzpunkt	2000 °C
Dichte	2.6
Brechungsindex	2.12
Löslichkeit	slightly soluble in H2O; insoluble in ethanol
Aggregatzustand	Powder
Wichte	2.5
Farbe	White
Wasserlöslichkeit	Slightly soluble in water. Insoluble in alcohol.
Sensitive	Moisture Sensitive
Merck	14,1707
CAS Datenbank	20548-54-3(CAS DataBase Reference)
EPA chemische Informationen	Calcium sulfide (CaS) (20548-54-3)

Sicherheit

Kennzeichnung gefährlicher	Xi,N
R-Sätze:	31-36/37/38-50
S-Sätze:	28-61
RIDADR	UN 3179 4.1/PG 2
WGK Germany	2
TSCA	Yes
HazardClass	4.3
PackingGroup	III

Gefahreninformationscode (GHS)

CALCIUM SULFIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R31:Entwickelt bei Berührung mit Säure giftige Gase.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R50:Sehr giftig für Wasserorganismen.
S-Sätze Betriebsanweisung:
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Chemische Eigenschaften
CALCIUM SULFIDE is OFF-WHITE POWDER
Physikalische Eigenschaften
Calcium sulfide is slightly soluble in water but insoluble in alcohol. It reacts with acids, producing hydrogen sulfide gas. Calcium sulfide is pale yellow to light gray with a bitter taste. It is hygroscopic, producing an odor of H2S in moist air.
Occurrence
Calcium sulfide occurs in nature as the mineral oldhamite. It has several applications. The ‘luminous’ calcium sulfide is used in phosphors, luminous paints and varnishes. Calcium sulfide also is used as an additive to lubri cants; and as a flotation agent in ore extraction.
Verwenden
Calcium sulfide is used in phosphors, lubricant additives and luminous paints. It reacts with elemental sulfur to give a lime-sulfur. Further, it is used in ore dressing and flotation agent. In addition to this, it is used as a depilatory in the tanning industry and in cosmetics.
Verwenden
Calcium sulfide may be used to remove heavy metals from wastewater.
Verwenden
CALCIUM SULFIDE is used in electron emitters. Luminous CaS used for making luminous paints or varnishes.
synthetische
Calcium sulfide can be prepared by the direct reaction of the elements, calcined in an inert atmosphere, at a 1:1.05 molecular ratio:
Ca＋S＋heat→CaS
This white material crystallizes in a cubic structurelike rock salt and the bonding is highly ionic. This is consistent with its description as an ionic solid. CaS can also be produced by the “carbothermic reduction” of calcium sulfate, which entails the conversion of carbon, usually as charcoal, to CO2:
CaSO4＋ 2C→CaS＋ 2CO2
This can react further:
3CaSO4＋ CaS→4CaO＋ 4SO2
Thus, this type of preparation cannot be used to prepare a pure CaS salt.
Calcium sulfide is available commercially as the pure sulfide as well as the polysulfide due to its extensive usage in the past as an insecticide both agriculturally and in home gardens.
Allgemeine Beschreibung
Crystal structure of CaS is cubic. Electrical conductivity of calcium sufide in the temperature range of 650^oC-1000^oC was studied in great detail. It was concluded that CaS could be used as a potential electrolyte in a sulfur concentration cell.2

CALCIUM SULFIDE Upstream-Materialien And Downstream Produkte

Calciumsulfid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

20548-54-3, CALCIUM SULFIDE Verwandte Suche:

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