<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373665</termId><termName>sodium nitrite</termName><termType>PT</termType><termNote><![CDATA[ White hygroscopic crystals, the sodium salt of nitrous acid; used in dye manufacture, as a fixative for color photographs, a meat preservative, and as a corrosion inhibitor when applied to steel.  ]]></termNote><termCreatedDate>2026-03-30 20:40:46</termCreatedDate><relation><relationType>UF</relationType><termId>31373666</termId><termName>nitrite, sodium</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343447</termId><termName>sodium compounds</termName><termType>PT</termType></relation></term>  </Zthes>