1-Azulenesulfonic acid, 3-ethyl-7-(1-methylethyl)-, sodium salt 130442-59-0 3-Ethyl-7-(1-methylethyl)-1-azulenesulfonic acid sodium salt 97683-31-3 99287-30-6 Azuletil sodium KT 1-32 Sodium 3-ethyl-7-isopropyl-1-azulenesulfonate