<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373673</termId><termName>sodium tripolyphosphate</termName><termType>PT</termType><termNote><![CDATA[ A white, powdery inorganic compound, the sodium salt of the polyphosphate penta-anion. It is manufactured for use as an emulsifier and chelating agent in water softeners and detergents. In conservation it has been used as a sequestering agent for the treatment of excavated copper and bronze objects, a chelating agent in the conservation of paper objects, and as a surfactant in the cleaning of photographs. It has been suspected of contributing to water pollution. ]]></termNote><termCreatedDate>2026-03-30 20:40:46</termCreatedDate><relation><relationType>UF</relationType><termId>31373674</termId><termName>STP</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373675</termId><termName>STPP</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373676</termId><termName>tripolyphosphate, sodium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343447</termId><termName>sodium compounds</termName><termType>PT</termType></relation></term>  </Zthes>