MANGANESE(III) FLUORIDE Property

Melting point:

decomposes at >600℃ [KIR81]

Density 

3.54 g/mL at 25 °C(lit.)

solubility 

reacts with H2O

form 

Powder

color 

red

Specific Gravity

3.54

Water Solubility 

Insoluble in organic solvents. Hydrolyzed by water.

Sensitive 

Hygroscopic

Merck 

14,5741

crystal system

Monoclinic

Space group

C2/c

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.892	0.505	1.348	90	92.6	90	0.606

Exposure limits

ACGIH: TWA 2.5 mg/m3; TWA 0.02 mg/m3; TWA 0.1 mg/m3
OSHA: Ceiling 5 mg/m3
NIOSH: IDLH 500 mg/m3; IDLH 250 mg/m3; TWA 1 mg/m3; STEL 3 mg/m3

Stability:

Stable. Incompatible with strong oxidizing agents. Protect from moisture. Contact with combustible material may lead to fire.

CAS DataBase Reference

7783-53-1(CAS DataBase Reference)

EPA Substance Registry System

Manganese fluoride (MnF3) (7783-53-1)

Safety

Hazard Codes 

O,Xn

Risk Statements 

8-20/21/22-36/37/38

Safety Statements 

17-26-36/37/39

RIDADR 

UN 3087 5.1/PG 2

WGK Germany 

3

RTECS 

OP0882600

Hazard Note 

Harmful/Oxidising Agent/Hygroscopic

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

III

HS Code 

2826199090

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H272May intensify fire; oxidizer

H301Toxic if swalloed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

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

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

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

MANGANESE(III) FLUORIDE Chemical Properties,Usage,Production

Description

The manganese fluoride, MnF3, is preferably formed by fluorination of manganese(III) iodide. It is a solid, and although its decomposition pressure is lower than 10.1325kPa (0.1 atmosphere) at 600°C, fluorine is still released when heated. It is a strong fluorinating agent, which acts with sulfur, boron, silicon, carbon, phosphorus trichloride and carbon tetrachloride when heated. It is used to fluoride gaseous hydrocarbons.

Chemical Properties

purple powder or crystals

Uses

It is used as a fluorinating agent, useful for conversion of hydrocarbons into fluorocarbons. It is used in organic synthesis as Lewis acid to prepare a number of organic compounds.

Uses

Fluorinating agent in organic chemistry.

Preparation

Manganese(III) fluoride can also be formed via the reaction of elemental fluorine with a manganese(II) halide at around 250°C.

General Description

Manganese(III) fluoride (also known as manganese trifluoride), MnF3, is a red/purplish solid useful for converting hydrocarbons into fluorocarbons, that is, it is a fluorination agent. It forms a hydrate and numerous derivatives. MnF3 can be produced by reacting a solution of MnF2 in hydrogen fluoride with fluorine.

Hazard

Toxic material.

Synthesis

Dissolve Mn2O3 in hydrofluoric acid and concentrate the solution for crystallization, or reduce potassium permanganate in hydrofluoric acid with low manganese salt to obtain hydrated manganese fluoride MnF3·3H2O. This compound is soluble in cold water and does not decompose, and is stable in hot water in the presence of hydrofluoric acid. Anhydrous manganese trifluoride is slowly decomposed into manganese difluoride, hydrated manganese dioxide and hydrogen fluoride in water.