9376. Thorium Nitrate

Nomenclature

CAS number: 13823-29-5
Nitric acid thorium(4+) salt (4:1).
N4O12Th; mol wt 480.06.
N 11.67%, O 39.99%, Th 48.34%.
Th(NO3)4.

Description and references

Commercial form obtained as tetrahydrate; also crystallizes with 6 and 12 mols H2O. Obtained from monazite: Pearce et al., Inorg. Synth. II, 38 (1946).

Derivative

Tetrahydrate.

Nomenclature

CAS number: 13470-07-0
N4O12Th.4H2O; mol wt 552.12.
N 10.15%, O 46.36%, Th 42.03%, H 1.46%.

Properties

White, slightly deliquesc crystals. Very sol in water, alcohol, the soln having an acid reaction. Keep well closed.

Use

Thorium nitrate with 1% cerium nitrate constitutes the usual impregnating liq for incandescent mantles. As a titrant for determination of fluorine.