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Sodium alginate

Alginic acid sodium salt from brown algae, Algin, Sodium alginate
CAS Number:
FEMA Number:
MDL number:
E Number:
E 401

biological source


Quality Level



reg. compliance

FDA 21 CFR 117
FDA 21 CFR 150.161
FDA 21 CFR 173.310


see Safety & Documentation for available documents




flavors and fragrances

food allergen

no known allergens

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General description

Sodium alginate is the sodium salt of alginic acid, a natural polysaccharide found in brown algae. It is generally used as a stabilizer and thickener in the food industry. Sodium alginate may undergo cross-linking in the presence of divalent cations such as Ca2+ to form biodegradable stable gels, which finds applications as a material for cell encapsulation and immobilization.


Sodium alginate can be used to prepare:
  • Cationized casein-based polyelectrolyte complex for fragrance-controlled release applications.
  • Apple aroma microcapsules for cosmetic applications.


1 kg in poly bottle
5 kg in poly drum

Other Notes

A straight-chain, hydrophilic, colloidal, polyuronic acid composed of glucuronic and mannuronic acid residues.

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Certificate of Origin

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. What is the solubility of Sodium alginate, Product W201502?

    We do not perform solubility testing on this product. However, when we test the pH we perform the test at a 1% concentration in water

  4. What is the sample size for Sodium alginate, Product W201502?

    To inquire about the sample size of this product, please contact our SAFC Customer and Order Services at 800-227-4563

  5. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  6. What is the Department of Transportation shipping information for this product?

    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. 

  7. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Preparation of aroma microcapsules with sodium alginate and tetradecylallyldimethylammonium bromide (TADAB) and its potential applications in cosmetics
Song J and Chen H
Flavour and Fragrance Journal, 33(2), 160-165 (2018)
Encyclopedia of Food and Color Additives, 1, 67-70 (1997)
Evaluation of sodium alginate for bone marrow cell tissue engineering.
Wang L, et al.
Biomaterials, 24(20), 3475-3481 (2003)
Núria Blanco-Cabra et al.
Scientific reports, 10(1), 9390-9390 (2020-06-12)
Aggregates of Pseudomonas aeruginosa form a protective barrier against antibiotics and the immune system. These barriers, known as biofilms, are associated with several infectious diseases. One of the main components of these biofilms is alginate, a homo- and hetero-polysaccharide that
Alime Cengiz et al.
Foods (Basel, Switzerland), 8(9) (2019-08-28)
The potential use of iron-loaded alginate beads to fortify oil-in-water (O/W) emulsions was studied. Iron-loaded alginate beads with different sizes (0.65, 0.84, 1.5 and 2 mm) were produced by ionic gelation with calcium chloride, leading to 81% encapsulation efficiency (EE)

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