Thorium oxalate

Thorium oxalate is the inorganic compound with the formula Th(C₂O₄)₂(H₂O)₄. It is a white insoluble solid prepared by the reaction of thorium(IV) salts with an oxalic acid.^[1] The material is a coordination polymer. Each Th(IV) center is bound to 10 oxygen centers: eight provided by the bridging oxalates and two by a pair of aquo ligands. Two additional water of hydration are observed in the lattice.^[2]

Thorium oxalate

Identifiers
CAS Number	2040-52-0
ECHA InfoCard	100.016.400
EC Number	218-038-3
PubChem CID	74880
CompTox Dashboard (EPA)	DTXSID90942566
Properties
Chemical formula	C4O8Th
Molar mass	408.07 g/mol 444.114 g/mol (dihydrate)
Density	4.637 g/cm3 (anhydrous)
Solubility product (Ksp)	5.01 × 10−25
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

The solubility product (K_sp) of thorium oxalate is 5.01 × 10⁻²⁵.^[3] Density of anhydrous thorium oxalate is 4.637 g/cm³.