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Optical Whitening Agent is chemical agent that are added to laundry detergents for providing milky white appearance to white clothes & cleaner look to colored ones. It is also suitable to be used in pulp & paper industry for imparting superior whiteness to paper. This chemical agent is known to work by absorbing light and then re-emitting it in blue region making clothes appear brighter. Optical Whitening Agent generally contains aliphatic carbon-carbon double bond which shows sensitivity against sunlight & oxidation.