<?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">phosphoric acid</topic></authority><related type="broader"><topic>acid</topic></related><variant type="other"><topic>acid, orthophosphoric</topic></variant><variant type="other"><topic>acid, phosphoric</topic></variant><variant type="other"><topic>orthophosphoric acid</topic></variant> <note xml:lang="en"><![CDATA[ Any of the three acids, orthophosphoric acid, H3PO4, metaphosphoric acid, HPO3, or pyrophosphoric acid, H4P2O7, derived from phosphorous pentoxide, P2O5, and various amounts of water. ]]></note></mads>