<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344108</termId><termName>tetramethylammonium hydroxide</termName><termType>PT</termType><termNote><![CDATA[ Quaternary ammonium salt used as a basic solvent. ]]></termNote><termCreatedDate>2026-03-30 20:32:47</termCreatedDate><relation><relationType>UF</relationType><termId>31344109</termId><termName>TMAH</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31344110</termId><termName>hydroxide, tetramethylammonium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31320069</termId><termName>solvent by composition or origin</termName><termType>PT</termType></relation></term>  </Zthes>