"300379923" . . "natron"@en . "Hydrous sodium carbonate found in nature as evaporative residues. Used widely as a silica source in early glass manufacture; in ancient Egypt used as well as a bleach for linen, a preservative in mummification, and as an ingredient of incense."@en . . "2013-11-12T09:50:49"^^ . . "2012-11-13T11:56:10"^^ .