Thallium Selenide



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


Compound Formula SeTl2
Molecular Weight 487.7266


Melting Point 380.85 °C (717.53 °F)
Boiling Point N/A
Density 9.05 g/cm3
Monoisotopic Mass 489.865326 Da
Exact Mass 489.865346

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 Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

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.

Recent Research

Chelation of thallium by combining deferasirox and desferrioxamine in rats., Saljooghi, Amir Shokooh, Babaie Maryam, Mendi Fatemeh Delavar, Zahmati Maliheh, and Saljooghi Zoheir Shokouh , Toxicol Ind Health, 2016 Jan, Volume 32, Issue 1, p.83-8, (2016)

Stability of Tl(III) in the context of speciation analysis of thallium in plants., Sadowska, Monika, Biaduń Ewa, and Krasnodębska-Ostręga Beata , Chemosphere, 2016 Feb, Volume 144, p.1216-23, (2016)

Protective Effects of Diallyl Sulfide and Curcumin Separately against Thallium-Induced Toxicity in Rats., Abdel-Daim, Mohamed M., and Abdou Rania H. , Cell J, 2015 Summer, Volume 17, Issue 2, p.379-88, (2015)

Development of Scintillators in Nuclear Medicine., Khoshakhlagh, Mohammad, Islamian Jalil Pirayesh, Abedi Seyed Mohammad, and Mahmoudian Babak , World J Nucl Med, 2015 Sep-Dec, Volume 14, Issue 3, p.156-9, (2015)

Photoinduced Reactivity of the Soft Hydrotris(6-tert-butyl-3-thiopyridazinyl)borate Scorpionate Ligand in Sodium, Potassium, and Thallium Salts., Tüchler, Michael, Belaj Ferdinand, Raber Georg, Neshchadin Dmytro, and Mösch-Zanetti Nadia C. , Inorg Chem, 2015 Sep 8, Volume 54, Issue 17, p.8168-70, (2015)

Investigating the optical properties of polycrystalline AgCl1-xBrx (0≤x≤1) and Ag0.95Tl0.05Br0.95I0.05 for IR engineering., Korsakov, Alexandr S., Vrublevsky Dmitry S., Korsakov Victor S., and Zhukova Liya V. , Appl Opt, 2015 Sep 10, Volume 54, Issue 26, p.8004-9, (2015)

Quantitative (201)thallium scintigraphy for prediction of histological response to neoadjuvant chemotherapy in osteosarcoma; systematic review and meta-analysis., Kubo, Tadahiko, Shimose Shoji, Fujimori Jun, Furuta Taisuke, and Ochi Mitsuo , Surg Oncol, 2015 Sep, Volume 24, Issue 3, p.194-9, (2015)

Structural and electronic control of the metal to insulator transition and local orderings in the θ-(BEDT-TTF)2X organic conductors., Alemany, Pere, Pouget Jean-Paul, and Canadell Enric , J Phys Condens Matter, 2015 Oct 28, Volume 27, Issue 46, p.465702, (2015)

Diagnostic value of Thallium-201 scintigraphy in differentiating malignant bone tumors from benign bone lesions., Inai, Ryota, Shinya Takayoshi, Tada Akihiro, Sato Shuhei, Fujiwara Tomohiro, Takeda Ken, Kunisada Toshiyuki, Yanai Hiroyuki, Ozaki Toshifumi, and Kanazawa Susumu , Ann Nucl Med, 2015 Oct, Volume 29, Issue 8, p.674-81, (2015)