Сульфид таллия (Tl2S)

Description

Thallium(I) sulfide, Tl2S - thallium chalcogenide in the oxidation state +1, semiconductor material. Known as dithallium monosulfide and dithallium sulfide. The compound's historical significance is associated with photoelectronics: in 1917, Theodore Case used it to create a thallophide cell, one of the first photoresistors sensitive in the near-infrared region. The long-wavelength sensitivity limit of the material lies around 1.1 microns.

Basic Attributes

• CAS No.: 1314-97-2
• Chemical formula: STl2
• Molecular Weight: 440.83200
• Exact weight: 441.92100
• EU number: 215-250-8
• PSA specifications: 25.30000
• XLogP3: 0.64820
• Steam pressure: 12600 mm Hg. at 25 °C (value from supplier card)

Scope of application

• photoresistors and photocells with near-infrared sensitivity, including thallophide cells of historical designs
• infrared radiation detectors, sound reproducing heads of early sound film systems
• semiconductor materials and precursor for the production of ternary thallium chalcogenides
• studies of optoelectronic properties of chalcogenide compounds

Safety Information

• Packing level: II
• Hazard category: 6.1(a)
• Transport codes: UN 1707, class 6.1, packing group II
• Hazard class code: 26/28-33-51/53
• Safety instructions: 13-28-45-61
• Tags: T+ is very toxic; N is hazardous to the environment
• Hazard statements: H300 + H330, H373, H411
• Precautions: P260, P264, P273, P284, P301 + P310, P310

Features of treatment

Thallium compounds are cumulative poisons: the substance is dangerous if swallowed and inhaled, with repeated exposure it affects organs, and is toxic to the aquatic environment with long-term consequences. Wear gloves, safety glasses and a respirator; all operations with powder should be carried out in a fume hood. Do not raise dust, wash your hands after work. Do not dispose of washouts and residues into the sewer system.

Storage and transportation conditions

The warehouse is ventilated, dry, with a low temperature. The container is tightly closed, proximity to food products, feed and acids is excluded: upon contact with acids, sulfides release hydrogen sulfide. Transport according to UN 1707, class 6.1, packing group II.