Heat Pack 4 x 4 - American Scientific
Heat Pack 4 x 4 - American Scientific
This heat pack contains a super saturated solution of water and sodium acetate. Snapping the metal disc creates an exothermic chain reaction, causing the solution to crystallize. Heat packs can be recharged back to the liquid state by boiling in water for 10-15 minutes and allowing to slowly cool. Excellent for teaching about chemical reactions […]
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Heat Pack 4 x 4 - American Scientific
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Heat Pack 4 x 4 - American Scientific
BONUS! 5 for the price of 4 ! - see pictures Simple to use Heat Pack! - Just open unwrap and let sit for 10+ minutes to start the heat process. For Extra Protection Use Bags Double Bagged for Even Better Insulation From the Cold.
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