Introduction of Zinc fluoride
Introduction of Zinc fluoride
Molecular Formula：ZnF2 or F2Zn
Synonyms：ZINC FLUORIDE,ZnF2,Zinc fluoride, anhydrous,Zinc fluorure [French],difluoride;
Molecular Weight:103.4
CAS NO.：7783-49-5
Zinc fluoride appears as a white powder or crystalline mass. Density 4.84 g / cm3. Slightly soluble in water and denser than water. Also insoluble as a hydrate. ZnF2.xH2O. Used for galvanizing steel and making ceramics.
Molecular weight: 103.37700
Zinc fluoride Chemical Properties,Uses,Production
Description
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).
Chemical Properties
White powder. Soluble in hot acids; slightly soluble in water; insoluble in alcohol.
Physical properties
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.
Uses
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.
Preparation
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.
Safety Profile
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.
Purification Methods
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.]
We supply Zinc fluoride focus on quality, service and expertise:
• Quality: Producing purity synthetic Zinc fluoride, based on pure raw materials only, with the lowest heavy metal content. We can also manufacture products of different concentrations to meet customer needs.
• Service: Offer stable quality of the product to clients, keep doing best for after-sales service.A close cooperation with our clients enables us tobetter understand the customer's usage of our products, and make modifications according to the customer's feedback .
•Expertise: Custom-made packaging and logistics、different concentrations of chemical products can be offered to meet customer’s requirements.
FOSHAN NANHAI SHUANGFU CHEMICAL CO., LTD is one of the manufacture of medium and high quality Zinc fluoride, supply long term production and delivery of this product all over the world.
Attn:Nicole Huang (Sales Manager)
Add: Qishan Industry Park, Yanfeng Road, Shishan, Nanhai District,Foshan City,China.
Phone: 86 757 81108788
Mobile: 86 13928083637
E-mail: sales@df-chemicals.com
