The storage conditions that a Sigma-Aldrich catalog and label recommend for products are deliberately conservative. For many products, long-term storage at low temperatures will increase the time during which they are expected to remain in specification and therefore are labeled accordingly. Where short-term storage, shipping time frame, or exposure to conditions other than those recommended for long-term storage will not affect product quality, Sigma-Aldrich will ship at ambient temperature. The products sensitive to short-term exposure to conditions other than their recommended long-term storage are shipped on wet or dry ice. Ambient temperature shipping helps to control shipping costs for our customers. At any time, our customers can request wet- or dry-ice shipment, but the special handling is at customer expense if our product history indicates that the product is stable for regular shipment. See Shipping and Storage for more information.
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
The molecular weight of the F5631 is assayed on a lot-by-lot basis. The molecular weight will be reported on the certificate of analysis for each lot of product.
The F5631 is water-soluble. It is tested for solublity in water at 10mg/mL; this yields a clear to hazy, yellow to amber solution.
The F5631 is not tested for purity or to identify possible impurities. It is a crude fucoidan from Fucus vesiculosus.
In general, fucoidin is a branched polymer of L-fucose monosulfate joined predominately by 1,2 linkages. Fucoidin is also known in the literature as fucan. The properties are discussed further by Bernardi and Springer in J. Biol. Chem, 237, 75-80 (1962); the title of the article is "Properties of highly purified fucan".
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