Polyacrylamide (IUPAC poly (2-propenamide) or poly (1-carbamoylethylene), abbreviated as PAM) is a polymer (-CH2CHCONH2-) formed from acrylamide sub-units. It’s highly water-absorbent, forming a soft gel when hydrated.

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It has been used in soft contact lenses, along with being used as a filler for facial surgery. In 2013 Yarrock Farms trialed the usage of AG100 SAP ‘Water Jelly Crystals’. These crystals are an example of hydro-gels, which are super absorbent polymers.

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Results of the on farm trail can be viewed here

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Result of an investigation by Louise Hobbs for '2015 Frontiers in Science International Science Fair' can be viewed here