PHOSPHORUS TRIIODIDE Property

Melting point:

61 °C (lit.)

Boiling point:

decomposes at 227℃ [CRC10]

Density 

4.18 g/mL at 25 °C (lit.)

solubility 

reacts with H2O; soluble in ethanol

form 

Crystals or Granules

color 

Dark brown to black-gray

Water Solubility 

decomposed by H2O; soluble alcohol, CS2 [HAW93]

EPA Substance Registry System

Phosphorous triiodide (13455-01-1)

Safety

Hazard Codes 

C

Risk Statements 

14-34-37

Safety Statements 

26-36/37/39-45

RIDADR 

UN 3260 8/PG 2

WGK Germany 

3

F 

3-10

HazardClass 

4.1

PackingGroup 

II

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.

PHOSPHORUS TRIIODIDE Chemical Properties,Usage,Production

Chemical Properties

dark brown to black-grey crystals or granules

Uses

Phosphorus Triiodide is used in the structure-?property-?reactivity studies of dithiaphospholes.

General Description

Phosphorus triiodide (PI₃) is a trihalide of phosphorus that can be used as a deactivator and a deoxygenating agent.

Purification Methods

It decomposes in moist air and must be kept in a desiccator over CaCl2. It is crystallised from sulfur-free CS2; otherwise the m decreases to ca 55o. It is best to prepare it freshly. [Germann & Traxler J Am Chem Soc 49 307 1927, Klement in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 541 1963.] HARMFUL VAPOURS.