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432784

Sigma-Aldrich

Sodium Polyacrylate

cross-linked

Synonym(s):

Poly(acrylic acid), partial sodium salt-graft-poly(ethylene oxide), 2-propenoic acid, homopolymer, sodium salt

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About This Item

CAS Number:
MDL number:
UNSPSC Code:
12162002
NACRES:
NA.23

form

powder (Free-flowing granular)

crosslinking

cross-linked

particle size

90-850 μm

density

0.54 g/mL at 25 °C (lit.)

InChI

1S/C3H4O2.Na/c1-2-3(4)5;/h2H,1H2,(H,4,5);/q;+1/p-1

InChI key

NNMHYFLPFNGQFZ-UHFFFAOYSA-M

General description

Sodium Polyacrylate (ASAP) is an acrylic sodium salt based hydrophilic polymer with carbonyl and sodium as major groups present in the structure. Both groups facilitate the polymeric chain with absorption potential. It can be used as a superabsorbent material as, in the presence of a liquid, the ASAP chain swells and forms a gel substance.

Application

Absorbent for aqueous-based spills. Retention and slow release aid for water.

Features and Benefits

Superabsorbent polymer. Absorbs many times its weight of aqueous fluids.
Absorbs aqueous fluids to give gels which retain fluids under stress. Polymer swells in water but does not dissolve. Amount of aqueous fluid absorbed decreases with increasing salt content.

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Synthesis of self-crosslinking sodium polyacrylate hydrogel and water-absorbing mechanism
Hua F and Qian M
J. Mater. Sci., 36(3), 731-738 (2001)
Biocompatible Polymeric Materials and Tourniquets for Wounds (2010)
Preparation and swelling properties of crosslinked sodium polyacrylate
Liu M and Guo T
Journal of Applied Polymer Science, 82(6), 1515-1520 (2001)

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