Does disodium dihydrogen pyrophosphate have gluten?

No, disodium dihydrogen pyrophosphate does not have gluten. Gluten is a protein found in wheat, barley, and rye. Disodium dihydrogen pyrophosphate is a chemical compound with the formula Na2H2P2O7. It is a white powder that is soluble in water. It is used as a food additive, an emulsifier, and a sequestrant.