A currently published frequently asked question on the product page notes, "The estimated molecular weight range for this material is 12,000 - 40,000 Daltons." Without knowing the "medium" molecular weight range previously used or the intended application, it is not possible to advise whether an adjustment in the amount of the product used is advisable.
W201502
Sodium alginate
Synonym(s):
Alginic acid sodium salt from brown algae, Algin, Sodium alginate
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About This Item
CAS Number:
FEMA Number:
2015
MDL number:
UNSPSC Code:
12164502
E Number:
E 401
NACRES:
NA.21
grade:
Halal
biological source:
synthetic
food allergen:
no known allergens
Pricing and availability is not currently available.
Recommended Products
biological source
synthetic
grade
Halal
reg. compliance
FDA 21 CFR 117
FDA 21 CFR 150.161
FDA 21 CFR 173.310
application(s)
flavors and fragrances
Documentation
see Safety & Documentation for available documents
food allergen
no known allergens
Organoleptic
odorless
SMILES string
[Na+].[O-]C(=O)C1O[C@H]([C@H]([C@H]([C@@H]1O)O)O)O
InChI
1S/C6H10O7.Na/c7-1-2(8)4(5(10)11)13-6(12)3(1)9;/h1-4,6-9,12H,(H,10,11);/q;+1/p-1/t1-,2-,3-,4?,6+;/m0./s1
InChI key
MSXHSNHNTORCAW-MPGIDXPLSA-M
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Related Categories
General description
Application
Other Notes
A straight-chain, hydrophilic, colloidal, polyuronic acid composed of guluronic and mannuronic acid residues.
Disclaimer
For R&D or non-EU Food use. Not for retail sale.
related product
Product No.
Description
Pricing
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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I used to use a medium molecular weight sodium alginate (SA). Now, what if I use the SA with a lower or higher molecular weight? In this case, should I decrease/increase the amount of SA I use?
1 answer-
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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What is the viscosity of this Alginate
1 answer-
The viscosity of this material varies from lot to lot and may range from 5.0 - 40.0 cps. This information is reported in the lot specific Certificate of Analysis. Please see the link below to review a sample or lot specific Certificate:
https://www.sigmaaldrich.com/product/aldrich/w201502#product-documentationHelpful?
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Is this product certified Kosher?
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Unfortunately, this material is not considered Kosher. A Kosher certificate is not available.
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is it good for crosslinking with chloride calcium?(becuase of low viscosity)
1 answer-
This product is a Flavors & Fragrance product typically used as a stabilizer and thickener in the food industry. The estimated molecular weight range for this material is 12,000 - 40,000 daltons. Currently, there is no product option available that has been tested for the ability to crosslink with calcium chloride. A brief search of the literature reveals a publication that used sodium alginate with a molecular weight of 100,000 daltons and an M/G ratio of 1.56 for calcium crosslinking studies. A link to this article, as well as potentially suitable products, has been listed below.
A1112 : 60-70 % M 30-40 % G ; M/G ratio of 1.56. The degree of polymerization is 400-600. Molecular weight: approx. 30 000 - 100 000
https://www.sigmaaldrich.com/product/sigma/a1112
71238 : 25-35 % M ; 65-70 % G ; M/G ratio of 0.43. Molecular weight: approx. 100 000 - 200 000 g/moL
https://www.sigmaaldrich.com/product/sigma/71238Link to publication:
https://inis.iaea.org/collection/NCLCollectionStore/_Public/48/052/48052840.pdfHelpful?
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What is the density of Sodium Alginate, product W201502 (CAS 9005-38-3)?
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The density of the product is 1 g/mL.
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Is there any information of the G/M ratio for this? what species of brown algae is this harvested from?
1 answer-
The mannuronic to guluronic acid ratio for this product is not determined on a lot-specific basis. However, the typical mannuronic acid content is approximately 61% and the guluronic acid content is approximately 39%. with a resulting M/G ratio of 1.56. The species of brown algae is Macrocystis pyrifera.
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What is the sample size for Sodium alginate, Product W201502?
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The SAMPLE-K quantities vary from product to product and lot to lot. There is no established quantity assigned. These are typically gram quantities intended for use in formulation evaluation, however some more expensive compounds may contain smaller amounts.
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What is the average molecular weight of this product?
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This product has a molecular weight ranging from 12000-40000 Daltons, based on the viscosity.
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