羼甲基纖(xian)(xian)(xian)維素(su) (CMC) 或纖(xian)(xian)(xian)維素(su)膠是一種纖(xian)(xian)(xian)維素(su)衍生(sheng)物,其羧甲基 (-CH2-COOH) 與(yu)構(gou)成纖(xian)(xian)(xian)維素(su)主鏈的吡喃葡萄糖單體的部(bu)分(fen)羥基結合。 常用作(zuo)它的鈉鹽,即羧甲基纖(xian)(xian)(xian)維素(su)鈉。