aluminum sulfate

noun

, Chemistry.

1. a white, crystalline, water-soluble solid, Al 2 (SO 4 ) 3 , used chiefly as a water-purifying agent, as a mordant, and as a size in the manufacture of paper.

Word History and Origins

Origin of aluminum sulfate¹

First recorded in 1865–70

Example Sentences

Regulators suspect a significant portion of Stauffer’s waste is alum mud, a radioactive sludge that is a byproduct of producing aluminum sulfate.

From Los Angeles Times

Although such products are natural, they almost always contain alum in the form of potassium aluminum sulfate or ammonium aluminum sulfate.

From Seattle Times

Addressing alkaline soil requires products like sphagnum peat, elemental sulfur, aluminum sulfate, iron sulfate, acidifying nitrogen, and organic mulches, according to Grove Collaborative.

From Seattle Times

The aluminum sulfate will be applied to three quarters of the lake starting Wednesday.

From Washington Times

The treatment is alum, which is a combination of aluminum sulfate and sodium aluminate.

From Washington Times