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aluminum sulfate

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noun Chemistry.
  1. a white, crystalline, water-soluble solid, Al2(SO4)3, used chiefly as a water-purifying agent, as a mordant, and as a size in the manufacture of paper.

Origin of aluminum sulfate

First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018