Thallium Selenide



Request Quote

Product Code Available Product Forms Request A Quote
TL-SE-05-P (5N) 99.999% Thallium Selenide Powder Request
TL-SE-05-ST (5N) 99.999% Thallium Selenide Sputtering Target Request
TL-SE-05-WSX (5N) 99.999% Thallium Selenide Wafer Request
TL-SE-05-I (5N) 99.999% Thallium Selenide Ingot Request
TL-SE-05-L (5N) 99.999% Thallium Selenide Lump Request


Compound Formula SeTl2
Molecular Weight 487.7266
Appearance N/A
Melting Point 380.85 °C (717.53 °F)
Boiling Point N/A
Density 9.05 g/cm3
Exact Mass 489.865346
Monoisotopic Mass 489.865326 Da

Health & Safety Info  |  MSDS / SDS

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Statements N/A
Transport Information N/A
Globally Harmonized System of Classification and Labelling (GHS) N/A


Thallium Selenide (TlSe) is a crystal grown product generally immediately available in most volumes. Technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.


Dithallium selenide, Thallium(I) Selenide, Thallium selenide (Tl2Se), Thallium(III) selenide, Thallium monoselenide, selenium; thallium

Chemical Identifiers

Formula Tl2Se
CAS 1315-08-8
Pubchem CID 6914514
EC No. 239-627-1
IUPAC Name selenium; thallium
Beilstein Registry No. N/A
SMILES [Tl+].[Tl+].[Se-2]
InchI Identifier InChI=1S/Se.2Tl/q-2;2*+1

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Material Safety Data Sheet (MSDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes.

Related Products & Element Information

See more Thallium products. Thallium (atomic symbol: Tl, atomic number: 81) is a Block P, Group 13, Period 6 element with an atomic weight of 204.38. Thallium Bohr ModelThe number of electrons in each of thallium's shells is 2, 8, 18, 32, 18, 3 and its electron configuration is [Xe] 4f14 5d10 6s2 6p1. The thallium atom has a radius of 170 pm and a Van der Waals radius of 196 pm. Thallium was discovered by Sir William Crookes in 1861 and first isolated by Claude-Auguste Lamy in 1862. Thallium is a post-transition metal that is not found free in nature. Thallium is primarily used for its electrical conductivity as thallium sulfide, which changes with exposure to infrared light. This ability makes the compound useful in photocells. Elemental ThalliumThallium bromide-iodide crystals have been used as infrared optical materials. Thallium has also been used with sulfur, selenium or arsenic to produce low melting glasses which become fluid between 125 and 150 °C, while thallium oxide has been used to produce glasses with a high index of refraction, and is also used in the manufacture of photo cells. Its name is drived from the Greek word thallos, which means twig or green shoot.