Xie Jian-wu
2005
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Journal
Fine and Specialty Chemicals
Abstract
By using o -aminoanisole, m -aminobenzenesulfonic acid and formaldehyde as raw materials, 4-amino-3-methoxyphenylazobenzene-3’-sulfonic acid sodium is prepared through following reactions i.e. ω sulfonation, diazo coupling, hydrolysis and salting out. And the process parameters influencing on reaction are investigated, the yield of final product is up to 80%.