<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320304</termId><termName>phosphoric acid</termName><termType>PT</termType><termNote><![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. ]]></termNote><termCreatedDate>2026-03-30 20:26:19</termCreatedDate><relation><relationType>UF</relationType><termId>31320305</termId><termName>acid, orthophosphoric</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31320306</termId><termName>acid, phosphoric</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31320307</termId><termName>orthophosphoric acid</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31306060</termId><termName>acid</termName><termType>PT</termType></relation></term>  </Zthes>