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
A2033
Alginic acid sodium salt from brown algae
Medium viscosity
Synonym(s):
Algin, Sodium alginate
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About This Item
Recommended Products
biological source
algae (brown)
Quality Level
form
powder
color
white to brown
viscosity
≥2,000 cP, 2 %(25 °C)
solubility
water: 10 mg/mL, slightly hazy to strongly hazy, faintly yellow to yellow
storage temp.
2-8°C
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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Application
Other Notes
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
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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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what is the viscosity?
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As listed in the 'PROPERTIES' section, the viscosity is ?2,000 cP. The exact value is listed on the lot specific Certificate of Analysis. Please navigate to the DOCUMENTATION section of the Product Detail Page to access a Certificate under ‘Certificate of Analysis’: https://www.sigmaaldrich.com/product/sigma/a2033#product-documentation
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A2033 제품의 밀도를 알고 싶습니다 정확한 값까지는 아니어도 추정치 만이라도 알고 싶습니다
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Unfortunately, the density of this product is not determined internally. However, various external sources state that Sodium Alginate has a density of 1.0 g/cm3(Temp: 25 °C).
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What is the average molecular weight of this product?
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The Molecular Weight of this product is approximately 200,000 daltons.
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What is the purity and the loss on drying of the product A2033? Additionally, what is the ash content?
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The purity and loss on drying are not tested for alginic acid. Please see the link below to review the testing and specifications for this product: https://www.sigmaaldrich.com/specification-sheets/235/361/A2033-BULK________SIGMA____.pdf
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How to sterilization this product without properties interference?
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Solutions may be filter-sterilized or autoclaved prior to the addition of cations (required for gelation). Note that extended autoclave times may be detrimental to bead formation.
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Does this product create a low or high stiffness gel?
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This product is not tested for gelation or gel strength. Alginate forms a gel in the presence of cations. Typically CaCl2 is used to initiate gel formation. Increasing the concentration of calcium will result in a more firm gel. Calcium chloride may be added at a range of 0.1M to 0.5M, with gel strength increasing with the CaCl2 concentration.
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What is the ratio of mannuronic acid to guluronic acid in this product (A2033)?
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The A2033 has a mannuronic acid to guluronic acid ratio of approximately 1.56. The mannuronic acid range is 60-70 % and guluronic acid range is 30-40 %.
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what is the final product when alginate lyase act on sodium alginate in Tris-Hcl buffer system
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Alginate lyase is an enzyme that catalyzes the degradation of alginate, a polysaccharide found in brown algae. The resulting post-digest products would be oligosaccharides and monosaccharides. It is often used to reduce viscosity of alginate or de-encapsulate cells. See product A1603 for additional information on this enzyme.
https://www.sigmaaldrich.com/product/sigma/a1603Helpful?
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