Thallium(I) carbonate

Thallium(I) carbonate

Names
Other names thallium monocarbonate
Identifiers
CAS Number	6533-73-9
ChemSpider	21553
EC Number	229-434-0
Jmol interactive 3D	Image
PubChem	23031
InChI InChI=1S/CH2O3.2Tl/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2 Key: DASUJKKKKGHFBF-UHFFFAOYSA-L InChI=1/CH2O3.2Tl/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2 Key: DASUJKKKKGHFBF-NUQVWONBAJ
SMILES [Tl+].[Tl+].[O-]C([O-])=O
Properties
Chemical formula	Tl2CO3
Molar mass	468.776 g/mol
Appearance	white crystals
Odor	odorless
Density	7.11 g/cm^3, solid
Melting point	272 °C (522 °F; 545 K)
Solubility in water	5.2 g/100 mL (25 °C) 27.2 g/100 mL (100 °C)
Solubility	insoluble in alcohol, ether, acetone
Structure
Crystal structure	monoclinic
Hazards
EU classification (DSD)	not listed
NFPA 704	0 4 0
Lethal dose or concentration (LD, LC):
LD50 (Median dose)	21 mg/kg (mouse, oral)[1]
LDLo (Lowest published)	23 mg/kg (rat, oral)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Thallium(I) carbonate (Tl₂CO₃) is a chemical compound. It can be used for the manufacture of imitation diamonds, in chemical analysis to test for carbon disulfide, and as a fungicide. Like other thallium compounds, it is considered extremely toxic, with an oral median lethal dose of 21 mg/kg in mice. Due to its toxicity, it is listed in the United States List of Extremely Hazardous Substances as of 2007.^[2]

Safety

Conditions/substances to avoid are: acids, magnesium with hydride, aluminium, hydrosulfuric acid, phosphorus pentoxide.

Preparation

Thallium carbonate is created by the saturation of hot aqueous thallium(I) hydroxide with carbon dioxide.

References

1. "Thallium (soluble compounds, as Tl)". Immediately Dangerous to Life and Health. National Institute for Occupational Safety and Health (NIOSH).
2. "Emergency First Aid Treatment Guide THALLOUS CARBONATE". Chemical Emergency Preparedness and Prevention. U.S. Environmental Protection Agency. Retrieved 2 June 2012.