7790-30-9

Basic information

• Product Name: THALLIUM(I) IODIDE
• Synonyms: THALLOUS IODIDE;THALLIUM (OUS) IODIDE;THALLIUM(I) IODIDE;THALLIUM (I) IODIDIE;THALLIUM IODIDE;THALLIUM IODIDE (OUS);Thallium iodide (Tl2I2);Thallium iodide (TlI)
• CAS NO: 7790-30-9
• Molecular Formula: ITl
• Molecular Weight: 331.29
• EINECS: 232-199-7
• Product Categories: Crystal Grade Inorganics;Metal and Ceramic Science;Salts;Thallium Salts;ThalliumMetal and Ceramic Science;metal halide
• Mol File: 7790-30-9.mol
• Article Data: 0

Chemical Properties

• Melting Point: 440 °C(lit.)
• Boiling Point: 823°C
• Flash Point: 824°C
• Appearance: Yellow/Powder
• Density: 7.29 g/mL at 25 °C(lit.)
• Vapor Pressure: 13.8mmHg at 25°C
• Water Solubility: Practically insoluble in water
• Sensitive: Light Sensitive
• Merck: 14,9264
• CAS DataBase Reference: THALLIUM(I) IODIDE(CAS DataBase Reference)
• NIST Chemistry Reference: THALLIUM(I) IODIDE(7790-30-9)
• EPA Substance Registry System: THALLIUM(I) IODIDE(7790-30-9)

Safety Data

• Hazard Codes: T+,N
• Statements: 26/28-33-51/53
• Safety Statements: 13-28-45-61
• RIDADR: UN 1707 6.1/PG 2
• WGK Germany: 3
• RTECS: XG5425000
• TSCA: Yes
• HazardClass: 6.1
• PackingGroup: II
• Hazardous Substances Data: 7790-30-9(Hazardous Substances Data)

Usage

Description

Thallium (I) iodide is a yellow solid, nearly insoluble in water. It is used as infrared radiation transmitter (crystals mixed with thallium bromide).

Chemical Properties

Yellow powder. Insoluble in alcohol; slightly soluble in water; soluble in aqua regia.

Uses

Different sources of media describe the Uses of 7790-30-9 differently. You can refer to the following data:
1. Mixed crystals with thallium bromide for infrared radiation transmitters.
2. Thallium(I) iodide is used in mercury lamp to enhance its performance. It is mainly used for underwater lighting, since the blue green light produced has least absorption in water. Scintillator made by using iodide salt of thallium, sodium and cesium is utilized for radiation scintillation detectors.

Safety Profile

Poison by ingestion and subcutaneous routes. Human systemic effects: blood pressure lowering, change in motor activity, muscle weakness. When heated to decomposition it emits very toxic fumes of T1 and I-. See also IODIDES and THALLIUM COMPOUNDS.

Purification Methods

Reflux it for 2-3hours with water containing HI, then wash it until acid-free, and dry it at 120o. Store it in brown bottles. [D.nges in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 870 1963]. POISONOUS.

InChI:InChI=1/HI.Tl/h1H;/q;+1/p-1