Sodium Polyacrylate




Introduction: Sodium Polyacrylate

About: I enjoy physically self-destructive acts in the name of science (like testing the taste of hydroflouric acid). I do stupid stuff constantly, like breaking open a flourescent bulb with a hammer to get some me...

Here are some pictures of the amazing material sodium polyacrylate (SPA). In the pictures you will see what it does, and if you can't tell what happened, I added first 25, then 50 ml of water to about 3 ml of SPA. All the water was absorbed. The captions will give you a breif description of what you see in each slide. Enjoy.
Chemical Formula:

Pic 1: (from left to right) Powder scoop, bottle of SPA, Erlenmeyer flask
Pic 2: Adding SPA to the flask
Pic 3: SPA in the flask
Pic 4: Added 25 ml of water, absorbed and the SPA takes on the texture of fake snow
Pic 5: Some SPA in my hand, feels cool due to evaporation
Pic 6: Added another 25 ml of water to SPA, feels cold and slimy (think partially solidified Jello)



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    30 Discussions

    Its a polymer. I used to make the stuff in two different absorption formulas for a company I used to work for. One would absorb 100x and the other would absorb 1000x its own weight in water. Uses? Keeping water in soil in dry arid regions, baby diapers, feminine napkins... you go from there.

    4 replies

    I want it in ball shape and cube shape. Can you guide me how to make that kind of geometrical shape with the SPA

    Don't know the percentage that is used, but it isn't much. They slowly dry out, letting out moisture back into the soil in a much longer time frame than with soil alone. They can then be rehydrated either by nature or by artificial means.

    How to get the ball shape or dry beads out of it? suppose I have water and the SPA powder and then how to make the spherical ball or cube? please share your knowledge

    I bought that stuff & the stuff that glows in the dark , mixed them to gather & made glowing snow ,which worked really well. then i decided to freeze it & threw it at the side of my house which made a glowing splater mark when it got dark which was really cool

    4 replies

    no, i had directions thank you very much. for example, i showed how you could use it to water your plants when you are on holiday.

    i admit, united nuclear is my universal supplier. but i wasn't product-placement-ing. i'm too young for that stuff

    ......i'm just messn with ya.....I always notice when a label or a name or something gets stuck in there.....