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432784

Sigma-Aldrich

Sodium Polyacrylate

cross-linked

Synonyme(s) :

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

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About This Item

Numéro CAS:
Numéro MDL:
Code UNSPSC :
12162002
Nomenclature NACRES :
NA.23
Le tarif et la disponibilité ne sont pas disponibles actuellement.

Forme

powder (Free-flowing granular)

Réticulation

cross-linked

Taille des particules

90-850 μm

Densité

0.54 g/mL at 25 °C (lit.)

Chaîne SMILES 

[Na+].[O-]C(=O)C=C

InChI

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

Clé InChI

NNMHYFLPFNGQFZ-UHFFFAOYSA-M

Description générale

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.[1][2][3]

Application

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

Caractéristiques et avantages

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.

Pictogrammes

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Mention d'avertissement

Warning

Mentions de danger

Classification des risques

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

Organes cibles

Respiratory system

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Équipement de protection individuelle

dust mask type N95 (US), Eyeshields, Gloves


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Certificats d'analyse (COA)

Lot/Batch Number

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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

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

Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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