ZIRCONIUM IODIDE Property

Melting point:

499°C

Boiling point:

431°C (estimate)

Density 

4.85

storage temp. 

under inert gas (nitrogen or Argon) at 2–8 °C

solubility 

very soluble in H2O

form 

powder

color 

Yellow

Specific Gravity

4.914

Water Solubility 

Insoluble in water.

Sensitive 

Air & Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

Merck 

14,10178

Exposure limits

ACGIH: TWA 5 mg/m3; STEL 10 mg/m3
NIOSH: IDLH 25 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3

CAS DataBase Reference

13986-26-0(CAS DataBase Reference)

EPA Substance Registry System

Zirconium iodide (ZrI4) (13986-26-0)

Safety

Hazard Codes 

C

Risk Statements 

34

Safety Statements 

22-26-27-36/37/39-45

RIDADR 

UN 3260 8/PG 2

WGK Germany 

3

TSCA 

No

HazardClass 

8

PackingGroup 

III

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

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

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.

P363Wash contaminated clothing before reuse.

ZIRCONIUM IODIDE Chemical Properties,Usage,Production

Description

Zirconium(IV) iodide, ZrI4, is the most readily available iodide of zirconium. It is an orange-colored solid that degrades in the presence of water. The compound was once renowned as an intermediate in the purification of zirconium metal. This compound is volatile, subliming as intact tetrahedral ZrI4 molecules.

Chemical Properties

orange crystal(s); fumes heavily in air; cub, a=1.179nm [KIR84] [MER06]

Uses

Used in the van Arkel-de Boer refining process.

Preparation

It is prepared by the direct reaction of powdered zirconium metal and iodine. Pyrolysis of zirconium(IV) iodide gas by contact of hot wire was the first industrial process for the commercial production of pure ductile metallic zirconium.

Structure and conformation

Like most binary metal halides, it has a polymeric structure. The compound exists as a polymer consisting of octahedral Zr(IV) centers, each with a pair of terminal iodide ligands and four doubly bridging iodide ligands. The Zr-I distances are 2.692 (terminal) and 3.030 A? .