Thallium (I) sulfate

Structural formula
General
Surname	Thallium (I) sulfate
other names	Dithallium sulfate
Molecular formula	Tl 2 SO 4
Brief description	white odorless solid
External identifiers / databases
CAS number 7446-18-6 EC number 231-201-3 ECHA InfoCard 100.028.365 PubChem 24833 Wikidata Q414866
properties
Molar mass	504.83 g mol −1
Physical state	firmly
density	6.77 g cm −3
Melting point	632 ° C
solubility	Soluble in water (48.7 g l −1 at 20 ° C)
safety instructions
GHS hazard labeling from  Regulation (EC) No. 1272/2008 (CLP) , expanded if necessary danger H and P phrases H: 300-372-315-411 P: 264-273-301 + 310-314
Toxicological data	16 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thallium (I) sulfate is a chemical compound from the group of thallium compounds and sulfates .

Extraction and presentation

Thallium (I) sulfate can be obtained by reacting thallium with sulfuric acid.

${\displaystyle \mathrm {2\ Tl+H_{2}SO_{4}\longrightarrow Tl_{2}SO_{4}+H_{2}} }$

properties

Thallium (I) sulfate is a white, odorless, non-flammable solid. When heated, the compound decomposes, releasing thallium oxides and sulfur oxides. Its crystal structure is isomorphic to that of potassium sulfate (orthorhombic with a = 7.808, b = 5.929, c = 10.665 Å ).

use

Thallium (I) sulfate was used as a rodenticide (colloquially: rat poison ) from the 1920s to around the mid-1970s , e.g. B. from Bayer AG in the products Zelio poison grains (poison wheat; active ingredient content 2% thallium sulfate; packaging with red warning color) and Zelio paste (active ingredient content 2.5% thallium sulfate; packaging with blue warning color). Today, it is no longer generally approved, but can be used in closed rooms (ie intradomally) with special approval from the federal authority for the extermination of rats and mice. However, it has become obsolete due to the second generation of coumarin derivatives .

Related links

• Basic thallium (III) sulfate Tl (OH) SO ₄ • 2 H ₂ O

Individual evidence

1. ↑ ^{a b c d e f g h} Entry on thallium (I) sulfate in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
2. ↑ Entry on dithallium sulfate in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on December 15, 2019. Manufacturers and / or distributors can expand the harmonized classification and labeling .
3. ↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 886.
4. ↑ Anna Charlotte Fuhrmeister: Poisonings - Panorama change of the last decades . Dissertation at the Medical Faculty of the University of Bonn, 2005, p. 106.

Web links

• WHO / FAO Data Sheet on Pesticides (PDS) for Thallium sulfate ( Memento from July 2, 2014 in the Internet Archive )