<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">sodium carbonate</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31373639</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:40:45</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">sal soda</dcterms:alternative> <dcterms:alternative xml:lang="en">soda</dcterms:alternative> <dcterms:alternative xml:lang="en">soda ash</dcterms:alternative> <dcterms:alternative xml:lang="en">soda crystal</dcterms:alternative> <dcterms:alternative xml:lang="en">washing soda</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ An anhydrous grayish-white, odorless, water-soluble powder, NA2CO3, usually obtained by the Solvay process and containing about 1 percent of impurities consisting of sulfates, chlorides, and bicarbonates. It is used in the manufacture of glass, ceramics, soaps, paper, petroleum products, as a cleanser, for bleaching, and in water treatment. ]]></dc:description></metadata>