KRS-5 Thallium Bromoiodide

Linear Formula:


MDL Number:


EC No.:



(2N) 99% Thallium Bromoiodide
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(3N) 99.9% Thallium Bromoiodide
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(4N) 99.99% Thallium Bromoiodide
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(5N) 99.999% Thallium Bromoiodide
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KRS-5 Thallium Bromoiodide Properties (Theoretical)

Compound Formula BrITl2
Molecular Weight 615.58
Appearance Deep red crystal
Melting Point 420 °C (790 °F)
Boiling Point N/A
Density 7.4 g/cm3
Morphology cubic
Solubility in H2O N/A
Refractive Index 2.4
Poisson's Ratio 0.37
Specific Heat 150 J/kg-K
Thermal Conductivity 0.55 W/m-K
Thermal Expansion 6.0 µm/m-K
Young's Modulus 31 GPa

KRS-5 Thallium Bromoiodide Health & Safety Information

Signal Word Danger
Hazard Statements T+, N
Hazard Codes H300-H330-H373-H411
Risk Codes 26/28-33-51/53
Safety Statements 2-13-28-45
RTECS Number N/A
Transport Information UN1707 6.1/PG II
WGK Germany N/A

About KRS-5 Thallium Bromoiodide

Thallium Bromoiodide (Thallium Bromo-Iodide, or KRS-5) is a thallium halogenide optical crystal used in attenuated total reflection prisms, lenses, and windows in infrared spectrometry. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available, as is additional research, technical and safety (MSDS) data. Please contact us for information on lead time and pricing above.

KRS-5 Thallium Bromoiodide Synonyms

KRS-5, Thallium bromide/iodide, Thallium Bromo-Iodide, Thallium Bromine Iodide, TlBr-Tll, Tl(Br-I), ATR/MIR crystal

Chemical Identifiers

Linear Formula (TlBr)(TlI)
MDL Number N/A
EC No. N/A
Beilstein/Reaxys No. N/A
Pubchem CID 23431893
IUPAC Name thallium(1+); bromide; iodide
SMILES [Br-].[I-].[Tl+].[Tl+]
InchI Identifier InChI=1S/BrH.HI.2Tl/h2*1H;;/q;;2*+1/p-2

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 Elements


See more Bromine products. Bromine (atomic symbol: Br, atomic number: 35) is a Block P, Group 17, Period 4 element. Its electron configuration is [Ar]4s23d104p5. The bromine atom has a radius of 102 pm and its Van der Waals radius is 183 pm. In its elemental form, bromine Bromine Bohr Model has a red-brown appearance. Bromine does not occur by itself in nature; it is found as colorless soluble crystalline mineral halide salts. Bromine was discovered and first isolated by Antoine Jérôme Balard and Leopold Gmelin in 1825-1826.


See more Iodine products. Iodine (atomic symbol: I, atomic number: 53) is a Block P, Group 17, Period 5 element with an atomic radius of 126.90447. The number of electrons in each of Iodine's shells is 2, 8, 18, 18, 7 and its electron configuration is [Kr] 4d10 5s2 5p5. The iodine atom has a radius of 140 pm and a Van der Waals radius of 198 pm. In its elemental form, iodine has a lustrous metallic gray appearance as a solid and a violet appearance as a gas or liquid solution. Elemental IodineIodine forms compounds with many elements, but is less active than the other halogens. It dissolves readily in chloroform, carbon tetrachloride, or carbon disulfide. Iodine compounds are important in organic chemistry and very useful in the field of medicine. Iodine was discovered and first isolated by Bernard Courtois in 1811. The name Iodine is derived from the Greek word "iodes" meaning violet.


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 derived from the Greek word thallos, which means twig or green shoot.


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