<?xml version="1.0" encoding="utf-8"?><rdf:RDF  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"  xmlns:skos="http://www.w3.org/2004/02/skos/core#"  xmlns:map="http://www.w3c.rl.ac.uk/2003/11/21-skos-mapping#"  xmlns:dct="http://purl.org/dc/terms/"  xmlns:dc="http://purl.org/dc/elements/1.1/"><skos:ConceptScheme rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_en">  <dc:title>Tesaurus d&apos;Art i Arquitectura</dc:title>  <dc:creator>Getty Institute</dc:creator>  <dc:contributor></dc:contributor>  <dc:publisher></dc:publisher>  <dc:rights></dc:rights>  <dc:subject></dc:subject>  <dc:description><![CDATA[  ]]></dc:description>  <dc:date>0000-00-00</dc:date>  <dct:modified>2024-01-24 15:40:44</dct:modified>  <dc:language>en</dc:language>  </skos:ConceptScheme>  <skos:Concept rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31373645"><skos:prefLabel xml:lang="en">sodium dithionite</skos:prefLabel><skos:notation>300375723</skos:notation><skos:altLabel xml:lang="en">dithionite, sodium</skos:altLabel><skos:altLabel xml:lang="en">hydrosulfite, sodium</skos:altLabel><skos:altLabel xml:lang="en">SDT</skos:altLabel><skos:altLabel xml:lang="en">sodium hydrosulfite</skos:altLabel><skos:altLabel xml:lang="en">sodium hydrosulphite</skos:altLabel> <skos:scopeNote xml:lang="en">Sodium dithionite (also known as sodium hydrosulfite) is a reductive bleaching chemical. Usage includes iron stain removal, and occasionally to treat corroded copper and silver artifacts in object conservation. It can also be used for purification of water and gas and as a sulfonating agent or a sodium ion source in industrial processes.</skos:scopeNote><skos:inScheme rdf:resource="http://AATesaurus.cultura.gencat.cat/aat/getty_en"/><skos:broader rdf:resource="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343447"/><skos:exactMatch> <skos:Concept rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_es/index.php?tema=14085152"> <skos:prefLabel xml:lang="es">sodium dithionite (traducció pendent)</skos:prefLabel> </skos:Concept></skos:exactMatch><skos:exactMatch> <skos:Concept rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_ca/index.php?tema=9847608"> <skos:prefLabel xml:lang="ca">sodium dithionite (traducció pendent)</skos:prefLabel> </skos:Concept></skos:exactMatch>  <dct:created>2026-03-30 20:40:46</dct:created>  </skos:Concept></rdf:RDF>