<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31319928</termId><termName>potassium borohydride</termName><termType>PT</termType><termNote><![CDATA[ A bleaching agent used in textle conservation as an alternative to or in tandem with the more commonly used sodium borohydride. ]]></termNote><termCreatedDate>2026-03-30 20:26:13</termCreatedDate><relation><relationType>UF</relationType><termId>31319929</termId><termName>borohydrate, potassium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31305866</termId><termName>bleach</termName><termType>PT</termType></relation></term>  </Zthes>