Barium acetate

Barium acetate (Ba(C2H3O2)2) is the salt of barium(II) and acetic acid. Barium acetate is toxic to humans, but has use in chemistry and manufacturing.
Preparation.
Barium acetate is generally produced by the reaction of acetic acid with barium carbonate:
The reaction is performed in solution and the barium acetate crystallizes out. Alternatively, barium sulfide can be used:
Again, the solvent is evaporated off and the barium acetate crystallized.
Properties.
Barium acetate is a white powder, which is highly soluble: at 0 °C, 55.8 g of barium acetate can be dissolved in 100 g of water. It decomposes upon heating into barium carbonate.
Reactions.
When heated in air, barium acetate decomposes to the carbonate. It reacts with acids: reaction with sulfuric acid, hydrochloric acid and nitric acid give the sulfate, chloride and nitrate respectively.
Uses.
Barium acetate is used as a mordant for printing textile fabrics, for drying paints and varnishes and in lubricating oil. In chemistry, it is used in the preparation of other acetates; and as a catalyst in organic synthesis.
In Pop Culture.
Barium Acetate was featured in a 2001 episode of the television series "Forensic Files", recounting the 1993 murder of a man by his teenaged daughter (Marie Robards), though the episode and other crime documentary shows examining the Robards case excluded the mention of barium acetate. 
Barium Acetate was featured in a 2014 episode of the crime documentary series "Redrum."
Barium acetate was named as the choice poison of a teen's murder of her father in Deadly Women "Parents Peril", S6 E2.