<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">aluminum sulfate</topic></authority><related type="other"><topic>alum</topic></related><related type="broader"><topic>sulfate</topic></related><related type="broader"><topic>compounds</topic></related><variant type="other"><topic>papermakers&apos; alum</topic></variant><variant type="other"><topic>sulfate, aluminum</topic></variant> <note xml:lang="en"><![CDATA[ White crystalline salt found naturally as mineral alunogenite; made synthetically by treating bauxite with sulfuric acid. It is used as a dye mordant, in tanning, as a flocculant in water purification, and for sizing paper.   ]]></note></mads>