{"id":26551,"date":"2026-09-28T17:01:00","date_gmt":"2026-09-28T14:01:00","guid":{"rendered":"https:\/\/artrestorationsupplies.gr\/?post_type=product&#038;p=26551"},"modified":"2026-09-28T17:07:23","modified_gmt":"2026-09-28T14:07:23","slug":"ammonium-oxalate-%ce%bf%ce%be%ce%b1%ce%bb%ce%b9%ce%ba%cf%8c-%ce%b1%ce%bc%ce%bc%cf%8e%ce%bd%ce%b9%ce%bf-ammonium-oxalate","status":"publish","type":"product","link":"https:\/\/artrestorationsupplies.gr\/en\/product\/ammonium-oxalate-%ce%bf%ce%be%ce%b1%ce%bb%ce%b9%ce%ba%cf%8c-%ce%b1%ce%bc%ce%bc%cf%8e%ce%bd%ce%b9%ce%bf-ammonium-oxalate\/","title":{"rendered":"Ammonium Oxalate"},"content":{"rendered":"<p>Ammonium oxalate monohydrate ((NH<sub>4<\/sub>)<sub>2<\/sub>C<sub>2<\/sub>O<sub>4<\/sub>\u00b7H<sub>2<\/sub>O, CAS 6009-70-7) from C.T.S. Applied in poultices, it reacts with the calcite of the substrate to form a thin, insoluble, acid-resistant layer of calcium oxalate (whewellite\/weddellite) \u2013 the \u00abammonium oxalate treatment\u00bb for protecting marble and wall paintings.<\/p>\n<ul>\n<li><strong>Purity:<\/strong> 99.8%; white crystals<\/li>\n<li><strong>Solubility:<\/strong> 48 g\/l in water (20 \u00b0C); pH 6.5 (4% solution)<\/li>\n<li><strong>Uses:<\/strong> 3\u20135% poultices in deionised water (with cellulose\/paper pulp) for a few hours to passivate carbonate surfaces of marble, limestone and wall paintings<\/li>\n<li>Supplied by: C.T.S. S.r.l. (Italy)<\/li>\n<\/ul>\n<p><strong>Safety:<\/strong> Harmful if swallowed and in contact with skin (UN 2811, toxic solid); wear gloves, goggles and mask. Safety data sheet (SDS) available on request.<\/p>\n<p class=\"ars-imp\"><strong>Made to order \u00b7 imported from abroad.<\/strong> This product is ordered from the manufacturer. Import shipping costs may be added to the price; we confirm them by email before payment.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ammonium oxalate monohydrate 99.8% for the protective conversion of calcium carbonate into calcium oxalate on marble, stone and wall paintings.<\/p>","protected":false},"featured_media":26552,"template":"","meta":[],"product_brand":[1253],"product_cat":[1084,1191,1196],"product_tag":[],"class_list":["post-26551","product","type-product","status-publish","has-post-thumbnail","product_brand-cts","product_cat-1084","product_cat-syntirisi-ktirion-toichografion-psifidoton","product_cat-1196","first","onbackorder","taxable","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/26551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/26551\/revisions"}],"predecessor-version":[{"id":26742,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/26551\/revisions\/26742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/media\/26552"}],"wp:attachment":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/media?parent=26551"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_brand?post=26551"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_cat?post=26551"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_tag?post=26551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}