POTASSIUM HEPTAFLUOROTANTALATE(V) Property

Melting point:

°Cd ec.)

Density 

4.56 g/mL at 25 °C(lit.)

vapor pressure 

0Pa at 20℃

form 

Powder

Specific Gravity

4.56

color 

colorless crystals, crystalline

Water Solubility 

Decomposes in water. Slightly soluble in hydrogen fluoride.

LogP

-1 at 20℃

CAS DataBase Reference

16924-00-8(CAS DataBase Reference)

EPA Substance Registry System

Tantalate(2-), heptafluoro-, dipotassium (16924-00-8)

Safety

Hazard Codes 

T,Xi

Risk Statements 

23/25

Safety Statements 

45

RIDADR 

UN 3288 6.1/PG 3

WGK Germany 

1

RTECS 

TT1225000

Hazard Note 

Irritant

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

HS Code 

28269090

Hazardous Substances Data

16924-00-8(Hazardous Substances Data)

Toxicity

mouse,LD50,oral,110mg/kg (110mg/kg),BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLDBEHAVIORAL: MUSCLE WEAKNESSBEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY),"Novye Dannye Po Toksikologii Redkikh Metalov Ikh Soedinenii," New Data on the Toxicology of Rare Metals and Their Compounds, Izrael'son, Z.I., ed., Moscow, Izdatel'stvo "Meditsina," 196Vol. -, Pg. 115, 1967.

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H301Toxic if swalloed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

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

P405Store locked up.

POTASSIUM HEPTAFLUOROTANTALATE(V) Chemical Properties,Usage,Production

Chemical Properties

White, silky needles. Slightly soluble in cold water; quite soluble in hot water.

Chemical Properties

Potassium heptafluorotantalate, K2TaF7, crystallizes in colorless, rhombic needles. It hydrolyzes in boiling water containing no excess of hydrofluoric acid. The solubility of potassium heptafluorotantalate in hydrofluoric acid decreases from 60 g/100 mL at 100 °C to 0.5 g/100 mL at room temperature. The different solubility characteristics of K2TaF7 and K2NbOF5 are the fundamental basis of the Marignac process.

Uses

It is an important raw material. Used in chemical research. Use as primary and secondary intermediate(Pharmaceutical Intermediates). Used in the production and preparation of tantalum powder.

Uses

Intermediate in preparation of pure tantalum.

Hazard

Toxic by inhalation.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by ingestion and intraperitoneal routes. When heated to decomposition it emits toxic fumes of F- and K2O.