Zinkfluorid

Bezeichnung:Zinkfluorid

CAS-Nr7783-49-5

Englisch Name:Zinc fluoride

CBNumberCB8366098

SummenformelF2Zn

Molgewicht103.39

MOL-Datei7783-49-5.mol

Synonyma

Zinkfluorid

Zinkfluorid physikalisch-chemischer Eigenschaften

Schmelzpunkt	872 °C (lit.)
Siedepunkt	1500 °C
Dichte	4.95 g/mL at 25 °C (lit.)
Dampfdruck	1 mm Hg ( 970 °C)
Flammpunkt	1500°C
Löslichkeit	Sparingly soluble in hydrochloric acid, nitric acid, and ammonium hydroxide.
Aggregatzustand	powder
Farbe	White to beige to light brown
Wichte	4.95
Wasserlöslichkeit	SLIGHTLY SOLUBLE
Sensitive	Hygroscopic
Merck	14,10136
Solubility Product Constant (Ksp)	pKsp: 1.52
Expositionsgrenzwerte	ACGIH: TWA 2.5 mg/m3 NIOSH: IDLH 250 mg/m3
Stabilität	hygroscopic
CAS Datenbank	7783-49-5(CAS DataBase Reference)
NIST chemische Informationen	Zinc difluoride(7783-49-5)
EPA chemische Informationen	Zinc difluoride (7783-49-5)

Sicherheit

Kennzeichnung gefährlicher	Xi,T
R-Sätze:	37/38-41-36/37/38-23/24/25
S-Sätze:	26-39-37/39-45-36/37/39-28
RIDADR	3288
WGK Germany	3
RTECS-Nr.	ZH3500000
F	3-9
Hazard Note	Toxic
TSCA	Yes
HazardClass	6.1
PackingGroup	III
HS Code	28261990
Giftige Stoffe Daten	7783-49-5(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Zinc fluoride Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R37/38:Reizt die Atmungsorgane und die Haut.
R41:Gefahr ernster Augenschäden.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S39:Schutzbrille/Gesichtsschutz tragen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
Beschreibung
Zinc fluoride (ZnF2) is an inorganic chemical compound. Zinc fluoride is used in the fluorination of organic compounds, in the manufacturing of phosphors for fluorescent lights, in preserving wood, in electroplating baths, in galvanizing steel, and in ceramic manufacturing for glazes and enamels. It is also used as a termite repellent, in pharmaceuticals (e.g. the inhibition of dentin demineralization and collagen degradation), as a flux for welding and soldering (e.g. aluminum).
Chemische Eigenschaften
White powder. Soluble in hot acids; slightly soluble in water; insoluble in alcohol.
Physikalische Eigenschaften
Anhydrous zinc fluoride is a white hygroscopic solid; tetragonal needles; density 4.9 g/cm³; melts at 872°C; vaporizes at 1,500°C; vapor pressure 1 torr at 1,243°C and 5 torr at 1,328°C; practically insoluble in water, 5.2 mg/L; sparingly soluble in HCl, HNO₃ and ammonia solution
The hydrated salt, ZnF₂?4H₂O, is a white crystalline solid; rhombohedral crystals; density 2.30 g/cm3; loses water of crystallization at 100°C; sparinglysoluble in water, about 1.52 g/100mL at 20°C.
Verwenden
Zinc Difluoride inhibits the erosion of enamel in vitro. It also functions as a fluorinating agent, Lewis acid catalyst and as an additive for catalytic transformations.
Verwenden
Zinc fluoride is a white crystalline powder, used in the manufacture of phosphors for fluorescent lights. It also is used in electroplating baths, in preservation of wood, in glazes and enamels for ceramics, and in fluorination reactions of organics.
synthetische
Zinc fluoride may be prepared by heating zinc hydroxide or zinc carbonate with hydrogen fluoride:
Zn(OH)2 + 2HF → ZnF2 + 2H2O
ZnCO3 + 2HF → ZnF2 + CO2 + H2O
Also, it can be precipitated by adding a solution of sodium fluoride to that of zinc acetate:
(CH3COO)2Zn + 2NaF → ZnF2 + 2CH3COONa
Hazard
Toxic material.
Flammability and Explosibility
Not classified
Sicherheitsprofil
Poison by subcutaneous route. Can react violently with potassium. A fluorination agent. When heated to decomposition it emits toxic fumes of F and ZnO. See also FLUORIDES and ZINC COMPOUNDS.
läuterung methode
A possible impurity is H2O which can be removed by heating at 100o or by heating to 800o in a dry atmosphere. Heating in the presence of NH4F produces larger crystals. It is sparingly soluble in H2O (1.51g/100mL) but more soluble in HCl, HNO3 and NH4OH. It can be stored in glass bottles. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 242 1963.]
Einzelnachweise
[1] http://www.npi.gov.au/resource/zinc-and-compounds
[2] https://hazmap.nlm.nih.gov/category-details?id=7782&table=copytblagents
[3] Patent EP 0001677 A1: Flux for soft soldering of aluminum, a fluxed solder composition containing said flux and a method of soft soldering aluminum using said flux

Zinkfluorid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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