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单词 alizarine yellow
释义 alizarine yellow
noun
Usage: often capitalized A&Y
: any of various mordant dyes not related chemically to alizarin but applicable by similar methods: as
 a. : a monoazo dye made by coupling diazotized m-nitroaniline with salicylic acid — called also Alizarine Yellow 2G; see dye table I (under Mordant Yellow 1)
 b. : a monoazo dye made by coupling p-nitroaniline with salicylic acid and used chiefly as an acid-base indicator — called also Alizarine Yellow R; see dye table I (under Mordant Orange 1)
 c. : gallacetophenone — called also Alizarine Yellow C
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