Sodium polyacrylate

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Sodium polyacrylate
Sodium polyacrylate skeletal.png
Sodium polyacrylate.jpg
IUPAC name
sodium prop-2-enoate
9003-04-7 YesY
ChemSpider 22446 YesY
Jmol interactive 3D Image
PubChem 4068533
Molar mass Variable
Density 1.22 g/cm3
Safety data sheet MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Sodium polyacrylate, also known as waterlock, is a sodium salt of polyacrylic acid with the chemical formula [-CH2-CH(CO2Na)-]n and broad application in consumer products. It has the ability to absorb as much as 200 to 300 times its mass in water. Sodium polyacrylate is an anionic polyelectrolyte with negatively charged carboxylic groups in the main chain. While sodium neutralized polyacrylic acids are the most common form used in industry, there are also other salts available including potassium, lithium and ammonium.


Sodium polyacrylate and other derivatives of polyacrylic acid have a wide variety of commercial and industrial uses that include:

See also[edit]

  • Polyacrylamide can be co-polymerized with acrylic acid and other monomers. In cross-linked form, these blended co-polymers can yield specialty superabsorbent polymers.
  • Polyacrylic acid


  1. ^ "What are the components of a typical disposable diaper?". Retrieved Jan 8, 2015. 
  2. ^ History of Super Absorbent Polymer Chemistry, M2 Polymer Technologies, Inc. Accessed 29 April 2009.