Sodium Alginate
CAS Number: 9005-38-3
Sodium alginate is the sodium salt of alginic acid, extracted from brown seaweed (Macrocystis, Ascophyllum species). It forms irreversible, heat-stable gels in the presence of calcium ions through ionic cross-linking, making it ideal for food encapsulation, restructured food products, and spherification applications. Available in various viscosity grades (low: 20–200 cP, medium: 200–500 cP, high: 500–1000 cP).
Technical Specifications
| appearance | White to light yellow powder |
| moisture (%) | ≤15.0 |
| pH (1% solution) | 6.0–8.0 |
| heavy metals (ppm) | ≤20 |
| viscosity (1% solution, 20°C, cP) | 20–1000 (grade dependent) |
Applications
- Food encapsulation and microencapsulation
- Restructured seafood and meat products
- Molecular gastronomy spherification
- Bakery fillings and fruit preparations thickening
- Textile and paper printing (industrial grade)
Key Features
- Unique cold-set gelling with calcium ions, no heat required
- Thermally irreversible gels stable up to 150°C
- Precise viscosity grades for specific food applications
- EU E401 approved, GRAS status, non-GMO certified
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CAS Number
9005-38-3
Category
Food / Beverage AdditivesAvailability
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