VANADIUM TRIFLUORIDE Property

Melting point:

140°C

Boiling point:

sublimes at 800℃ [STR93]

Density 

3,36 g/cm³

solubility 

insoluble in H2O, ethanol

form 

Powder

Specific Gravity

3.363?“

color 

yellow-green hexagonal, hexane crystals, crystalline

Water Solubility 

Practically insoluble in water, acetone, and glacial acetic acid

Sensitive 

Moisture Sensitive

Crystal Structure

VF3 type

crystal system

Three sides

Merck 

14,9922

Space group

R3c

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.517	0.517	1.344	90	90	120	0.3108

Exposure limits

ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3; Ceiling 0.05 mg/m3

CAS DataBase Reference

10049-12-4(CAS DataBase Reference)

Safety

Hazard Codes 

Xi,T

Risk Statements 

36/37/38-34-32-23/24/25

Safety Statements 

26-36-45-36/37/39-22

RIDADR 

UN2923

Hazard Note 

Irritant

HazardClass 

8

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Hazard statements

H300Fatal if swallowed

H314Causes severe skin burns and eye damage

H318Causes serious eye damage

H330Fatal if inhaled

Precautionary statements

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

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

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

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

P405Store locked up.

VANADIUM TRIFLUORIDE Chemical Properties,Usage,Production

Chemical Properties

greenish yellow powder(s); sublimes at bright red heat [MER06]

Uses

Employed in oxygen-sensitive applications, such as metal production.

Synthesis

4 g. of VCl3 is treated with anhydrous HF in a nickel, sintered alumina or platinum vessel. At the start of the experiment the apparatus is flushed with dry nitrogen to displace atmospheric oxygen. During the fluorination the tube is slowly heated to 200°C. After 1.5 hours the temperature is raised to red heat. The reaction is complete when the exit gas no longer contains any HCl. The product is allowed to cool to 100°C in a stream of HF gas, after which the cooling is continued in a nitrogen stream. The yield is 95%, based on VCl3.