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/418/501/product-dating-information-06-25-mk.pdf
181285
Poly(acrylic acid)
average Mv ~450,000
Synonym(s):
PAA
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| Size/SKU | Availability | Price |
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About This Item
crosslinking
~0.1 % cross-linked
Quality Segment
mol wt
average Mv ~450,000
viscosity
350-2500 cP
transition temp
Tg 106 °C
SMILES string
[Na+].[O-]C(=O)C=C
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
Application
Other applications may include:
- to study solute diffusion in Polyvinyl alcohol/PAA copolymer hydrogel
- synthesizing poly(N-isopropylacrylamide)-block-PAA copolymer which responds to both temperature and pH stimuli
- in preparing block copolymer of oligo (methyl methacrylate)/PAA for micellar delivery of hydrophobic drugs[1]
- as thickening agent for adhesives.
1 of 1
This Item | |||
|---|---|---|---|
| viscosity 350-2500 cP | viscosity 800-11,000 cP | viscosity 30,000-40,000 cP | viscosity 40,000-60,000 cP |
| transition temp Tg 106 °C | transition temp Tg 106 °C | transition temp Tg 106 °C | transition temp Tg 106 °C |
| Quality Level 200 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| mol wt average Mv ~450,000 | mol wt average Mv ~1,250,000 | mol wt average Mv ~3,000,000 | mol wt average Mv ~4,000,000 |
| crosslinking ~0.1 % cross-linked | crosslinking ~0.1 % cross-linked | crosslinking ~0.1 % cross-linked | crosslinking ~0.1 % cross-linked |
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Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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Is it fully soluble in water?
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This product is a high molecular weight Polyacrylic acid, with a viscosity-average molecular weight (Mv) of approximately 450,000. It is not cross-linked, thus it is water soluble. (Note that cross-linked polyacrylates are typically not water soluble.)
As this material is a high molecular weight polymer, it may take two or more hours to fully dissolve. The specification for viscosity testing requires 4% solution (40 mg/mL) of the polymer in water. This product may be water soluble at higher concentrations, however this has not been determined. Certainly, concentrations of less than 40 mg/mL would be suitable.
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