Chromous Acetate

Title: Chromous Acetate
CAS Registry Number: 628-52-4
Molecular Formula: C4H6CrO4
Molecular Weight: 170.08
Percent Composition: C 28.25%, H 3.56%, Cr 30.57%, O 37.63%
Line Formula: Cr(C2H3O2)2
Literature References: Prepn of monohydrate: Balthis, Jr., Bailar, Jr., Inorg. Synth. 1, 122 (1939); Hatfield, ibid. 3, 148 (1950); Kranz, Witkowska, ibid. 6, 144 (1960); Ocone, Block, ibid. 8, 125 (1966). Toxicity study: H. F. Smyth et al., Am. Ind. Hyg. Assoc. J. 30, 470 (1969).
Derivative Type: Monohydrate
Properties: Deep red powder, or monoclinic crystals; composed of dimeric units. Easily oxidized, especially when moist, to chromic acetate. Loses H2O when dried over P2O5 at 100°, changing color to brown. d 1.79. Slightly sol in cold water; readily sol in hot water; sol in and reacts with most acids; slightly sol in alcohol. Practically insoluble in ether. Keep tightly closed. LD50 orally in rats: 11.26 g/kg (Smyth).
Density: d 1.79
Toxicity data: LD50 orally in rats: 11.26 g/kg (Smyth)
Use: Prepn of other chromous salts; as O2 absorber in gas analysis.
Chromous Bromide Chromous Chloride Chromous Fluoride Chromous Formate Chromous Oxalate