12765-48-9 26545-58-4 37604-49-2 39336-68-0 55171-97-6 57573-47-4 61419-60-1 62046-93-9 Disodium methylenebisnaphthalenesulphonate EINECS 247-785-8 Naphthalenesulfonic acid, methylenebis-, disodium salt Naphthalenesulfonic acid, methylenedi-, disodium salt