<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373704</termId><termName>sulfate</termName><termType>PT</termType><termNote><![CDATA[ Compound that is a salt with the sulfate ion SO4 2-, or an ester of sulfuric acid. Sulfates comprise an enormous group of chemicals that contain the element sulfur. Sulfates are used in a variety of common products and processes.  ]]></termNote><termCreatedDate>2026-03-30 20:40:46</termCreatedDate><relation><relationType>UF</relationType><termId>31373705</termId><termName>sulfates</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373706</termId><termName>sulphate</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373707</termId><termName>sulphates</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343453</termId><termName>sulfur compounds</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31410855</termId><termName>copper sulfate</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31343472</termId><termName>magnesium sulfate</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31343475</termId><termName>aluminum sulfate</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31410860</termId><termName>ammonium sulfate</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31410862</termId><termName>iron sulfate</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31343553</termId><termName>sulfur</termName><termType>PT</termType></relation></term>  </Zthes>