What Is the Blue Goo Inside of Re-freezable Cold Packs?

Written by kat black
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Re-freezable cold packs, or gel packs, are great for keeping food cold and for applying to acute injuries. These packs come in a variety of shapes and sizes, but the majority are filled with a blue gel.

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Materials

Re-freezable gel packs contain vinyl-coated silica gel, hydroxyethyl cellulose or propylene glycol.

Colour

The refrigerants used to make gel packs are tasteless, odourless and colourless. If they were not coloured, it would be very difficult to tell when the gel pack leaked.

Toxicity

The gel inside the pack is safe as long as you don't touch it or ingest it. If you accidentally ingest the gel, consult a physician immediately. If your skin is exposed, wash thoroughly for at least 15 minutes. If your skin becomes irritated, consult a physician.

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