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Albemarle Corporation’s Magnolia South plant in Arkansas experienced a release of sulfur trioxide (or SO3) gas at 7:40 a.m. Monday.

Access to the plant was blocked while the gas leak was contained.

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Magnolia plant manager Jason Bevan said there were no injuries and the release was secured.

“We are continuing to coordinate with relevant authorities on this matter as safety remains Albemarle’s top priority,” Bevan said.

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According to chemical references, sulfur trioxide fumes when exposed to air. The gas is colorless but has a pungent odor. SO3 is used as a reagent – a substance added to a system to cause a chemical reaction.

Albemarle Corporation’s Magnolia manufacturing operations make up one of the world’s largest suppliers of bromine and bromine chemicals. Over 500 employees and two plant sites in the Magnolia area produce more than 30 different chemical ingredients used in the manufacturing of a range of chemicals, according to the company website. Among these products are flame retardants used in household plastics, fabric fibers and insulation material.

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