Gelling sugar (also called jam sugar or jelly sugar) is used for making fruit jams. It is a mixture of sugar and pectin. Properly stored sugar has a near infinite shelf life but gelling sugar only has a shelf life of a few month. Aferwards it still works like usual sugar but does not work as a gelling agent anymore.

Why does that happen?

  • Depending on the answer, this might be more suitable for chemistry SE. Please migrate if appropriate.
    – quarague
    Dec 20, 2020 at 7:30


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