In the late 18th century, Charles Tennant revolutionised the linen trade by creating bleaching powder. Today, Tennants, the London company he founded, is owned by the Alexander family and makes and distributes more than 3,000 chemicals around the world, from adhesives to animal feed. Under group chairman, Paul Alexander, 64, sales were up 21% to £468.8m in 2017, boosted by domestic demand.
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