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The website zhongchen-chem.chinachemnet.com had the following in the web page, "8226; 1,5-Naphthalene Disulfonic Acid Dis." I viewed that the webpage stated " 8226; 1,6-Naphthalene Disulfonic Acid Dis." They also said " 8226; 1,6-Cleves Acid. 8226; 1,7-cleves acid. 8226; 2,7-Naphthalene Disulfonic Acid Dis. 8226; 1,6-Dihydroxy naphthalene. 8226; 1,5-dihydroxy naphthalene. Plain County Development Xingping Road Plains hospital in Germany and Thailand Xing Industry and Trade Co." The meta header had 1-Acetylamino-7-Naphthol as the first search term. This keyword is followed by 1-naphthol-5-sulfonic acid, 1, and 5-Naphthalene Disulfonic Acid Disodium Salt which isn't as important as 1-Acetylamino-7-Naphthol. The other words they used was 1. 6-Naphthalene Disulfonic Acid Disodium Salt is included but will not be understood by search engines.