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| | Barium chromate Basic information |
| | Barium chromate Chemical Properties |
| Melting point | 210 °C (dec.) (lit.) | | density | 4.5 g/mL at 25 °C (lit.) | | form | Powder | | Specific Gravity | 4.5 | | color | Yellow | | Water Solubility | Insoluble in water. Soluble in strong acids. | | Merck | 14,972 | | Solubility Product Constant (Ksp) | pKsp: 9.93 | | Exposure limits | OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 | | Stability: | Stable. Oxidizer. May react vigorously with reducing agents. | | InChIKey | QFFVPLLCYGOFPU-UHFFFAOYSA-N | | CAS DataBase Reference | 10294-40-3(CAS DataBase Reference) | | NIST Chemistry Reference | barium chromate(VI)(10294-40-3) | | EPA Substance Registry System | Barium chromate (10294-40-3) |
| | Barium chromate Usage And Synthesis |
| Chemical Properties | Barium chromate is a heavy, yellow powder(s); rhomb, monoclinic; prepared from BaCl2 and Na2CrO4 solutions, followed by filtering resulting precipitate; used in safety matches, as a corrosion inhibitor.[MER06] [HAW93] | | Physical properties | Yellow orthorhombic crystal; density 4.50 g/cm3; darkens on heating; insoluble in water and organic solvents; dissolves in mineral acid with decomposition. | | Uses | Barium chromate has been found to be useful in many capacities. It is an oxidizing agent, making it useful as a burn rate modifier in pyrotechnic compositions. It is especially useful in delay compositions such as delay fuses. Barium chromate is used as a pigment, oxidizing agent, colorant in glass, and sulfate scavenger in chromium electroplating baths, ceramics, and porcelain. It acts as a corrosion inhibitor in jointing pastes and metal primers. Further, it is used in fuses, safety matches, ignition control devices and high-temperature batteries. In addition to this, it is used as a carrier for the chromium ions and useful as a burn rate modifier in pyrotechnic compositions. It is involved as a catalyst in the alkane dehydration reaction. | | Application | Barium chromate is an oxidizing chemical compound composed of the elements barium and chromium. It is a pigment almost entirely in anticorrosion jointing pastes to prevent electro-chemical corrosion at junctions of dissimilar metals; some use in artists' colors and in coloring glass, ceramics, porcelain. Also used in metal primers, pyrotechnic compositions. | | Preparation | Interaction of barium chloride and sodium chromate. The precipitate is washed, filtered and dried.
BaCl2+Na2CrO4→BaCrO4↓+2NaCl | | Hazard | Confirmed carcinogen. | | Safety Profile | Confirmed human
carcinogen. A poison. Mutation data
reported. Reacts vigorously with reducing
materials. See also BARIUM
COMPOUNDS (soluble) and
CHROMIUM COMPOUNDS. Used in
pyrotechnics and as an explosive initiator. |
| | Barium chromate Preparation Products And Raw materials |
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