TUNGSTEN(VI) OXYCHLORIDE Property

Melting point:

211 °C(lit.)

Boiling point:

337°C

Density 

11.920

solubility 

reacts with H2O; soluble in benzene, CS 2

form 

red hygroscopic crystals

color 

red hygroscopic crystals, crystalline

Water Solubility 

decomposed by H2O; soluble CS2, benzene [KIR83] [HAW93]

Sensitive 

air sensitive, moisture sensitive

Safety

Hazard Codes 

Xi,C

Risk Statements 

36/37/38-34

Safety Statements 

26-37/39-45-36/37/39

RIDADR 

3262

WGK Germany 

3

F 

1-10

HazardClass 

8

PackingGroup 

III

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

H335May cause respiratory irritation

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P271Use only outdoors or in a well-ventilated area.

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

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

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

TUNGSTEN(VI) OXYCHLORIDE Chemical Properties,Usage,Production

Description

Tungsten(VI) oxytetrachloride, WOCl4, is a diamagnetic solid used to prepare other tungsten complexes. The orange-colored compound is soluble in nonpolar solvents, while it reacts with alcohols and water and forms adducts with Lewis bases.

Chemical Properties

Dark-red, acicular crystals. Decomposed by water and moist air. Keep in sealed glass container. Bp 227.5C, mp 211C, d 11.92. Soluble in carbon disulfide.

Uses

Incandescent lamps.

Preparation

It consists of weakly associated square pyramidal monomers. WOCl4 is formed from WO3 or WCl6.
WO3 + 2SOCl2→WOCl4+2SO2
WCl6 + (Me3Si )2O→WOCl4+ 2Me3SiCl

Hazard

Irritant.