单词 | red lake C pigment |
释义 | red lake C pigment [`red ¦lāk `sē ´pig·mǝnt] MATERIALS An organic azo pigment; made by coupling the diazonium salt (barium or sodium) of ortho-chloro-meta- toluidine-para-sulfonic acid with β-naphthol; used to color inks, plastics, and rubbers. |
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