亞硫酸氫鈣(Calcium bisulfite)是鈣的亞硫酸氫鹽,化學式為Ca(HSO3)2。亞硫酸氫鈣用於食品添加劑時當作防腐劑使用,其E編碼為E227。亞硫酸氫鈣是酸式鹽,水溶液呈酸性。它用於從木片生產紙張的亞硫酸鹽工藝。[1]
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