Thallium(I) carbonate

Thallium(I) carbonate

Names
Other names thallium monocarbonate
Identifiers
CAS Number	6533-73-9 Y
3D model (JSmol)	Interactive image
ChemSpider	21553 Y
ECHA InfoCard	100.026.759
EC Number	229-434-0
PubChem CID	23031
InChI InChI=1S/CH2O3.2Tl/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2 Y Key: DASUJKKKKGHFBF-UHFFFAOYSA-L Y 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/cm3, 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
Magnetic susceptibility (χ)	−101.6·10−6 cm3/mol
Structure
Crystal structure	monoclinic
Hazards
EU classification (DSD) (outdated)	not listed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, hydrogen sulfide, phosphorus pentoxide.

Preparation

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

References