{"code":"C29853","name":"Silicon Dioxide","terminology":"ncit","version":"26.09d","conceptStatus":"DEFAULT","leaf":false,"active":true,"synonyms":[{"name":"SILICON DIOXIDE","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"FDA","code":"ETJ7Z6XBU4","subSource":"UNII"},{"name":"Cab-O-Sil M-5P","termType":"BR","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Colloidal Silicon Dioxide","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Light Anhydrous Silicic Acid","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Quso F-22","termType":"BR","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Silica","termType":"SY","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Silicon Dioxide","termType":"PT","type":"FULL_SYN","typeCode":"P90","source":"NCI"},{"name":"Silicon Dioxide","type":"Preferred_Name","typeCode":"P108"}],"definitions":[{"definition":"A natural compound of silicon and oxygen found mostly in sand, Silica has three main crystalline varieties: quartz, tridymite, and cristobalite. Fine particulate silica dust from quartz rock causes over a long-term progressive lung injury, silicosis. (NCI04)","code":"P97","type":"DEFINITION","source":"NCI"}],"properties":[{"code":"P210","type":"CAS_Registry","value":"7631-86-9"},{"code":"P368","type":"CHEBI_ID","value":"CHEBI:30563"},{"code":"P350","type":"Chemical_Formula","value":"2O.Si"},{"code":"P322","type":"Contributing_Source","value":"FDA"},{"code":"P319","type":"FDA_UNII_Code","value":"ETJ7Z6XBU4"},{"code":"P366","type":"Legacy Concept Name","value":"Silica"},{"code":"P106","type":"Semantic_Type","value":"Hazardous or Poisonous Substance"},{"code":"P106","type":"Semantic_Type","value":"Inorganic Chemical"},{"code":"P207","type":"UMLS_CUI","value":"C0037098"}]}