Sodium polyacrylate

Sodium polyacrylate

Names
IUPAC name poly(sodium prop-2-enoate)
Identifiers
CAS Number	9003-04-7 Y
3D model (Jmol)	Interactive image
ChemSpider	22446 Y
ECHA InfoCard	100.118.171
PubChem	4068533
UNII	05I15JNI2J (2500000 MW) N
InChI InChI=1S/C3H4O2.Na/c1-2-3(4)5;/h2H,1H2,(H,4,5);/q;+1/p-1 Y Key: NNMHYFLPFNGQFZ-UHFFFAOYSA-M Y InChI=1S/C3H4O2.Na/c1-2-3(4)5;/h2H,1H2,(H,4,5);/q;+1/p-1 Key: NNMHYFLPFNGQFZ-REWHXWOFAB Key: NNMHYFLPFNGQFZ-UHFFFAOYSA-M
SMILES [Na+].[O-]C(=O)C=C
Properties
Chemical formula	(C3H3NaO2)n
Molar mass	Variable
Density	1.22 g/cm3
Hazards
Safety data sheet	MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
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. This superabsorbent polymer 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.

The origins of superabsorbent polymer chemistry trace back to the early 1960s when the U.S. Department of Agriculture developed the first super absorbent polymer materials.

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