Title: Barium Carbonate
CAS Registry Number: 513-77-9
Molecular Formula: CBaO3
Molecular Weight: 197.34
Percent Composition: C 6.09%, Ba 69.59%, O 24.32%
Line Formula: BaCO3
Literature References: Occurs in nature as the mineral witherite. Prepn: Gmelins, Barium (8th ed) 30, 301-303 (1932) and supplement, 186-188, 461-466 (1960). Manuf: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 121-125.
Properties: White, heavy powder. Poisonous! d (witherite) 4.2865. At about 1300° dec into BaO and CO2. Almost insol in water, 0.024 g in a liter. Slightly sol (1:1000) in CO2-water; sol in dil HCl, HNO3 or acetic acid; also sol in soln NH4Cl or NH4NO3.
Density: d (witherite) 4.2865
CAUTION: Potential symptoms of overexposure are excessive salivation, vomiting, severe abdominal pain, violent diarrhea; increased blood pressure; tinnitis, giddiness, vertigo; muscle twitching, convulsions, paralysis; dilated pupils; confusion, somnolence; cardiac arrest; death due to respiratory failure. See Clinical Toxicology of Commercial Products, R. E. Gosselin et al., Eds. (Williams & Wilkins, Baltimore, 5th ed., 1984) Section III, pp 61-63.
Use: Rat poison; in ceramics, paints, enamels, marble substitutes, rubber; manuf of paper, barium salts, electrodes, optical glasses; as an analytical reagent.