2,7-Naphthalenedisulfonic acid,4,5-dihydroxy-,monosodium salt;sodium 4,5-dihydroxy-7-sulfonaphthalene-2-sulfonate;CHROMOTROPIC ACID SODIUM SALT;Sodium hydrogen 4,5-dihydroxynaphthalene-2,7-disulphonate;EINECS 223-430-2;
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