Polyacrylic acid
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| Poly(acrylic acid) | |
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| Identifiers | |
| CAS number | 9003-01-4  |
| KEGG | C19501  |
| Properties | |
| Molecular formula | (C3H4O2)n |
| Molar mass | variable |
| Hazards | |
| EU classification |  Xi |
| R-phrases | R36 R37 R38 |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Poly(acrylic acid) or PAA or Carbomer is a type of anionic polymer. The monomer of poly(acrylic acid) is acrylic acid. In a water solution at neutral pH, many of the side chains of PAA will lose their protons and acquire a negative charge. This makes PAA a polyelectrolyte.
Dry PAA is a white solid. It is capable of adsorbing many times its weight in water, and hence is used in disposable diapers.[1]
It also is used as a thickening agent. It inactivates the antiseptic chlorhexidine gluconate.
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