请输入您要查询的英文单词：
单词
R acid
释义
R acid
noun
:
a crystalline sulfonic acid HOC
10
H
5
(SO
3
H)
2
derived from beta naphthol and used as a dye intermediate; 2-naphthol-3,6-disulfonic acid
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更新时间：2026/5/2 9:25:13