Barium Chromate

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Barium chromate, also known as Barium tetraoxochromate(VI), is a yellow sand like powder that produces green flames when heated. It is a well-known oxidizing agent and has many uses. It is also used as a stabilizer for chromate dyes and as an inhibitor of galvanic corrosion between dissimilar metals. It is an important ingredient of a number of anticorrosive substances used to remediate galvanic corrosion, and it can be found in safety matches, pottery pigments, ceramic and glass colorings and as an analytical reagent for the determination of sulfate or selenate.

Barium Chromate is insoluble in water but soluble in strong acids and has a melting point of 210 degC. It has a relative density of 3.65 and has a refractive index of 1.9. It is a stable material and does not react vigorously with reducing agents. It is also a good choice as a substitute for zinc chrome yellow in rust preventive paint.

Despite being an excellent oxidizing agent, it can be hazardous in case of over exposure. Inhalation of it can cause chromium poisoning and repeated exposures can lead to dermatitis. It is also a carcinogen and can be toxic to the kidneys, blood, eyes, liver and mucus membrane. Ingestion can cause vomiting and diarrhea. It is also irritating to the skin, eyes and respiratory tract. If handled improperly, it can cause pulmonary irritation and lung cancer. Barium chromate is non-flammable but should be stored in a cool dry place away from acids, alkalis and combustibles.