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KRS-5 Thallium Bromoiodide

Linear Formula:


MDL Number:


EC No.:



(2N) 99% Thallium Bromoiodide
Pricing > SDS > Data Sheet >
(3N) 99.9% Thallium Bromoiodide
Pricing > SDS > Data Sheet >
(4N) 99.99% Thallium Bromoiodide
Pricing > SDS > Data Sheet >
(5N) 99.999% Thallium Bromoiodide
Pricing > SDS > Data Sheet >

KRS-5 Thallium Bromoiodide Properties

Compound Formula


Molecular Weight



Deep red crystal

Melting Point

420 °C (790 °F)

Boiling Point



7.4 g/cm3

Refractive Index


Thermal Expansion

6.0 µm/m-K

Thermal Conductivity

0.55 W/m-K

Young's Modulus

31 GPa

Poisson's Ratio


Specific Heat

150 J/kg-K



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

KRS-5 Thallium Bromoiodide Chemical Identifiers

Linear Formula


Pubchem CID


MDL Number


EC No.


Beilstein Registry No.



thallium(1+); bromide; iodide



InchI Identifier


InchI Key


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, CAS 7726-95-6, bromine 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 drived from the Greek word thallos, which means twig or green shoot.

Recent Research

Thallium bromide iodide crystal acoustic anisotropy examination., Mantsevich, S N. , Ultrasonics, 2017 Mar, Volume 75, p.91-97, (2017)

Virgin silver nanoparticles as colorimetric nanoprobe for simultaneous detection of iodide and bromide ion in aqueous medium., Bothra, Shilpa, Kumar Rajender, Pati Ranjan K., Kuwar Anil, Choi Heung-Jin, and Sahoo Suban K. , Spectrochim Acta A Mol Biomol Spectrosc, 2015 Oct 5, Volume 149, p.122-6, (2015)

Phosphorus-Containing Bis-allenes: Synthesis and Heterocyclization Reactions Mediated by Iodine or Copper Dibromide., Essid, I, Laborde C, Legros F, Sevrain N, Touil S, Rolland M, Ayad T, Volle J-N, Pirat J-L, and Virieux D , Org Lett, 2017 Apr 07, Volume 19, Issue 7, p.1882-1885, (2017)

Nucleophilic Iododifluoromethylation of Aldehydes Using Bromine/Iodine Exchange., Levin, Vitalij V., Smirnov Vladimir O., Struchkova Marina I., and Dilman Alexander D. , J Org Chem, 2015 Sep 18, Volume 80, Issue 18, p.9349-53, (2015)

Iodide uptake by negatively charged clay interlayers?, Miller, Andrew, Kruichak Jessica, Mills Melissa, and Wang Yifeng , J Environ Radioact, 2015 Sep, Volume 147, p.108-14, (2015)

Vibrational spectroscopic and computational studies on diisopropylammonium bromide., Sahoo, Shradhanjali, Ravindran T R., Chandra Sharat, Sarguna R M., Das B K., Sairam T N., Sivasubramanian V, Thirmal C, and Murugavel P , Spectrochim Acta A Mol Biomol Spectrosc, 2017 Sep 05, Volume 184, p.211-219, (2017)

Sensitive immunosensing of squamous cell carcinoma antigen based on a nanocomposite of poly{3-amine-N-[3-(N-pyrrole)propyl]imidazole bromide} ionic liquid and gold nanoroots., Wu, Yingying, Zhao Yong, Wang Yanying, Ye Xiaoxue, Wu Tsunghsueh, Deng HongPing, Wu Peng, and Li Chunya , Biosens Bioelectron, 2017 Oct 15, Volume 96, p.140-145, (2017)

Enhanced pseudocapacitive performance of electroactive p-type conductive polymer in the presence of 1-octadecyl-3-methylimidazolium bromide., Ehsani, A, Kowsari E, M Najafi Dashti, Safari R, and H Shiri Mohammad , J Colloid Interface Sci, 2017 Oct 01, Volume 503, p.10-16, (2017)


June 23, 2017
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