Cadmium fluoride Property

Melting point:

1049 °C

Boiling point:

1748 °C

Density 

6.33 g/mL at 25 °C(lit.)

Flash point:

1758°C

solubility 

soluble in acid solutions; insoluble in ethanol

form 

Powder

Specific Gravity

6.64

color 

white

Water Solubility 

4.3 g/100 mL (25 ºC)

Crystal Structure

CaF2 type

crystal system

Cube

Merck 

14,1619

Solubility Product Constant (Ksp)

pKsp: 2.19

Space group

Fm3m

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.539	0.539	0.539	90	90	90	0.1564

CAS DataBase Reference

7790-79-6(CAS DataBase Reference)

NIST Chemistry Reference

Cadmium difluoride(7790-79-6)

EPA Substance Registry System

Cadmium fluoride (CdF2) (7790-79-6)

Safety

Hazard Codes 

T+,N,T

Risk Statements 

45-46-60-61-25-26-48/23/25-50/53

Safety Statements 

53-45-60-61

RIDADR 

UN 2570 6.1/PG 2

WGK Germany 

3

RTECS 

EV0700000

Hazard Note 

Toxic

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

28261990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Hazard statements

H301Toxic if swalloed

H330Fatal if inhaled

H340May cause genetic defects

H350May cause cancer

H360May damage fertility or the unborn child

H372Causes damage to organs through prolonged or repeated exposure

H400Very toxic to aquatic life

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P320Specific treatment is urgent (see … on this label).

P330Rinse mouth.

P405Store locked up.

Cadmium fluoride Chemical Properties,Usage,Production

Chemical Properties

White powder

Physical properties

Colorless cubic crystal; density 6.33 g/cm³; melts at 1,110°C; vaporizes at 1,748°C; vapor pressure 5 torr at 1,231°C; moderately soluble in water, 4.35 g/100mL at 25°C; soluble in hydrofluoric and other mineral acids; practically insoluble in alcohol and liquid ammonia.

Uses

Cadmium fluoride is used in phosphors, glass and nuclear reactor controls. It is also used in high-temperature lubricants and to start crystals for lasers. It is used in oxygen-sensitive applications such as the production of metallic alloys and it is also used in limited medical treatment protocols. In addition, it can be used in synthetic organic chemistry.

Uses

Manufacture of phosphors, glass; in nuclear reactor controls.

Definition

Available as pure crystals, 99.89%, d 6.6, mp approx- imately 1110C, soluble in water and acids, insoluble in alkalies.

Preparation

Cadmium fluoride is prepared by the reaction of gaseous fluorine or hydrogen fluoride with cadmium metal or its salt, such as chloride, oxide or sulfide:
Cd + F₂ → CdF₂
Cd + 2HF → CdF₂ + H₂
CdO + 2HF → CdF₂ + H₂O
It also may be obtained by dissolving cadmium carbonate in 40% hydrofluoric acid solution, evaporating the solution and drying in vacuum at 150°C:
CdCO₃ + 2HF → CdF₂ + H₂O + CO₂
It also may be prepared by mixing cadmium chloride and ammonium fluoride solutions, followed by crystallization.

Safety Profile

Confirmed human carcinogen. Poison by subcutaneous route. Violent reaction with K. When heated to decomposition it emits very toxic fumes of Cd and F-. See also FLUORIDES and CADMIUM COMPOUNDS.

Purification Methods

Crystallise it by dissolving it in hot water (25mL/g at room temperature) at 60o, filtering, then cooling. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 243 1963.]