Nickel fluoride Property

Melting point:

1380℃(lit.)

Boiling point:

1498.77°C (estimate)

Density 

4.72 g/mL at 25 °C(lit.)

vapor pressure 

0.001Pa at 20℃

solubility 

diethyl ether: insoluble(lit.)

pka

0.019[at 20 ℃]

form 

Crystalline

Specific Gravity

4.72

color 

Pale yellow

Water Solubility 

2.51 g/100 mL

Sensitive 

Hygroscopic

Merck 

14,6508

Exposure limits

ACGIH: TWA 2.5 mg/m3; TWA 0.1 mg/m3
NIOSH: IDLH 10 mg/m3; IDLH 250 mg/m3; TWA 2.5 mg/m3; TWA 0.015 mg/m3

Stability:

hygroscopic

CAS DataBase Reference

10028-18-9(CAS DataBase Reference)

NIST Chemistry Reference

Nickel difluoride(10028-18-9)

EPA Substance Registry System

Nickel fluoride (NiF2) (10028-18-9)

Safety

Hazard Codes 

T,Xi,Xn,N

Risk Statements 

45-36/37/38-42/43-40-68-50/53-48/23-41-38-25-61-49

Safety Statements 

53-26-36/37/39-45-36/37-61-60-22

RIDADR 

3288

WGK Germany 

3

RTECS 

QR6825000

Hazard Note 

Irritant

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

HS Code 

2826199090

Hazardous Substances Data

10028-18-9(Hazardous Substances Data)

Toxicity

LD50 i.v. in mice: 130 mg/kg (Nat. Acad. Sci.)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H315Causes skin irritation

H317May cause an allergic skin reaction

H318Causes serious eye damage

H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

H341Suspected of causing genetic defects

H350May cause cancer

H372Causes damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Nickel fluoride Chemical Properties,Usage,Production

Chemical Properties

Green crystalline powder

Chemical Properties

Nickel(II) fluoride has the tetragonal rutile structure with only slightly tetragonally compressed NiF6 octahedra; the Ni-F distances being 2.01 and 1.98 ?. Above the melting point it sublimes as a linear gaseous molecule. The anhydrous fluoride is rather unreactive towards concentrated acids; it is only slightly soluble in anhydrous hydrogen fluoride and is not attacked by electronegative elements such as chlorine, sulphur and phosphorus. The pale green tetrahydrate is slightly soluble in water; when heated, several intermediate hydrates are formed prior to N1F2.

Uses

Nickel fluoride?comprises the passivating surface that forms on nickel alloys, e.g. monel, which is why such materials are good to store or transport hydrogen fluoride or elemental fluorine.

Preparation

Nickel fluoride tetrahydrate [13940-83-5], NiF2.4H2O, and its anhydrous counterpart, nickel fluoride [10028-18-9], NiF2 , are the only known stable binary compounds of nickel and fluorine. The former is a greenish light yellow crystal or powder prepared by the addition of nickel carbonate to 30-50% aqueous HF solution. The nickel fluoride formed first goes into solution and then precipitates out as the tetrahydrate as the concentration of Nickel fluoride increases and that of HF decreases. When the addition of nickel is complete, the solution and the precipitates are dried at 75-100°C until all the water is expelled. The tetrahydrate has high solubility in aqueous HF, eg, 13.3 wt % in 30% HF. It is slightly soluble in water and insoluble in alcohol and ether.
Anhydrous Nickel fluoride, a light yellow colored powder, is prepared by the action of anhydrous HF on anhydrous NiCl2 , or nickel fluoride tetrahydrate at 300°C. It is also prepared by heating a mixture of NH4.HF2 and NiF2.4H2O. The other methods include the fluorination of metal salts using excess SF4 or using ClF3 at elevated temperatures, or the reaction of NiCO3 and anhydrous HF at 250°C.

Flammability and Explosibility

Non flammable

Safety Profile

NTP 10th Report on Carcinogens. Reacts violently with potassium. Chronic exposure may cause mottling of teeth, changes in bones. Mutation data reported. When heated to decomposition it emits toxic fumes of F-. See also FLUORIDES and NICKEL COMPOUNDS.