- Product Name: Sodium Alginate
- CAS: 9005-38-3
- Catalog: HG-BULK036
- Applications: Food Industry, Pharmaceuticals and Medical Applications, Cosmetics and Personal Care, Textiles and Printing.
Sodium alginate is a natural, water-soluble polysaccharide extracted from brown algae, such as kelp and giant kelp. It is widely recognized for its unique ability to form gels and modify the viscosity of aqueous solutions. At Alfa Chemistry, we offer high-quality sodium alginate that can be utilized in various industries, including food, pharmaceuticals, cosmetics, and textiles.
Key Features
Hydrophilic Nature
- Sodium alginate is highly soluble in water, forming a thick, viscous solution.
Gel Formation
- When exposed to calcium ions, sodium alginate forms an irreversible gel. The gel's hardness and flexibility can be controlled by adjusting the ratio of mannuronic (M) to guluronic (G) acid units in the alginate.
Biocompatibility
- Sodium alginate is biocompatible, non-toxic, and biodegradable.
Technical Data
| Items | Food grade | Industrial grade |
| Grain size | as the customer required | 30 mesh (100% passed), or as the customer required |
| Viscosity | ≥ 150mpa.s (or as the customer required) | as the customer required |
| Moisture | ≤ 15% | ≤ 15% |
| pH | 6.0～8.0 | 6.0～7.5 |
| Calcium | -- | ≤ 0.3% |
| Ash content | 30～37% | 20.0～24.0% |
| Insoluble matter in water | ≤ 3.0% | ≤ 0.6% |
| Transparency (0.5% Solution) | Qualified | ≥ 3cm |
| Heavy Metals | ≤ 0.004% | -- |
| Arsenic | ≤ 0.0002% | -- |
| Lead | ≤ 0.0004% | -- |
Applications
Sodium alginate has a wide range of applications across various industries:
Food Industry
- Sodium alginate is widely used as a thickening and stabilizing agent in a variety of food products, such as beverages, dairy products, sauces, dressings, and baked goods. It enhances texture and improves product stability by preventing separation and maintaining a uniform consistency.
Pharmaceuticals and Medical Applications
- Sodium alginate is employed in pharmaceutical formulations as a binder, slow-release agent, emulsifier, and film-forming material. It is also used in dental impression materials and wound dressings due to its ability to form gels that help in moisture retention and provide a soothing barrier.
Cosmetics and Personal Care
- In the cosmetic industry, sodium alginate is used for its moisturizing and hydrating properties. It is commonly included in skin care products such as creams, lotions, and face masks to enhance water retention and improve the texture of the skin.
Textiles and Printing
- Sodium alginate is widely utilized in textile and fabric printing processes. It acts as a thickener for printing pastes in techniques like active, disperse, and digital printing, helping to deliver consistent and vivid color application.
Storage and Packaging
- Storage Conditions: Stored in a cool, dry place away from direct sunlight.
- Packaging: Available in 25kg bags.
Alfa Chemistry's sodium alginate is a versatile and high-quality product that supports innovation across multiple industries, offering functional properties such as gelation, thickening, and stabilization, while also being environmentally responsible and regulatory compliant. For more information, please feel free to contact us.
