Multiple choice The sodium salt used in instant noodles is disodium guanylate disodium hydrogen phosphite disodium inosinate disodium octaborate tetrahydrate Reveal answer Fill a bubble to check yourself C Correct answer Explanation Disodium inosinate (E631) is the disodium salt of inosinic acid with the chemical formula C10H11N4Na2O8P. It is used as a food additive and often found in instant noodles, potato chips, and variety of other snacks.