1,3-Benzenedicarboxylic acid, 5-sulfo-, 1,3-dimethyl ester, sodium salt 219662-81-4 221136-58-9 3,5-Bis(methoxycarbonyl)benzenesulfonic acid sodium salt 3,5-Bis-(methoxykarbonyl)benzensulfonan sodny [Czech] 3,5-Bis-methylkarboxy-benzensulfonan sodny [Czech] 3965-55-7 5-Sulfoisophthalic acid, dimethyl ester, sodium salt 50974-97-5 51778-93-9 56660-04-9 67076-13-5 76796-13-9 Benzenesulfonic acid, 3,5-bis(methoxycarbonyl)-, sodium salt EINECS 223-578-8 Isophthalic acid, 5-sulfo-, 1,3-dimethyl ester, sodium salt Sodium dimethyl 5-sulphonatoisophthalate