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Iron oxide is a naturally occurring compound composed of iron and oxygen, found in various forms such as hematite (\(Fe2O3\)), magnetite (\(Fe3O4\)), and goethite (\(FeO(OH)\)).
Optical brighteners, also known as fluorescent whitening agents (FWAs), are chemical compounds added to laundry detergents to make fabrics appear whiter, brighter, and cleaner.
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