What is Sodium Alginate?
Sodium Alginate is a natural polysaccharide extracted from the cell walls of brown seaweed (kelp), particularly species of Laminaria, Macrocystis, and Ascophyllum. It is a white to pale yellow-brown powder valued for its exceptional ability to thicken aqueous solutions, form gels in the presence of calcium ions, and create stable emulsions. As a naturally derived hydrocolloid, it has become increasingly popular in both traditional food applications and modern culinary techniques.
Polychem Industries supplies Sodium Alginate in food grade and industrial grade to food manufacturers, molecular gastronomy chefs, textile printing companies, and pharmaceutical formulators across India and internationally. Its unique calcium-reactive gelling property, combined with excellent thickening and stabilising capability, makes it one of the most versatile natural hydrocolloids in commercial use.
Available Grades
| Grade | Form | Purity | Standard | Applications |
|---|---|---|---|---|
| Food Grade | White to pale yellow-brown fine powder | ≥90% (Food Grade) | FSSAI / FCC / E401 | Food thickener, gelling agent, molecular gastronomy, dairy |
| Industrial / Textile Grade | White to brown powder | 85%+ | Industrial | Textile printing thickener, paper coating, welding rod binder |
Applications & Uses
Molecular Gastronomy & Spherification
Famously used in modern culinary techniques including spherification, where Sodium Alginate reacts with calcium ions to form a thin gel membrane around liquid droplets, creating the distinctive caviar-like spheres popularised in molecular gastronomy.
Ice Cream & Dairy Products
Used as a stabiliser and texturiser in ice cream, dairy desserts, and processed dairy products, helping control ice crystal formation and providing a smooth, creamy texture throughout the product's shelf life.
Food Gels & Desserts
Used to create unique gel textures in desserts and food products, taking advantage of its distinctive calcium-triggered, non-reversible gelling mechanism which differs from temperature-dependent gels like gelatin or agar.
Sauces & Food Thickening
Used as a thickening agent in sauces, dressings, and various processed food products, providing the desired viscosity and mouthfeel while remaining stable across a range of processing conditions.
Textile Printing
Industrial Grade Sodium Alginate is widely used as a thickening agent in textile printing paste formulations, particularly for reactive dye printing on cotton, due to its compatibility with reactive dyes and excellent print definition properties.
Pharmaceutical & Wound Care
Used in certain pharmaceutical formulations and in alginate-based wound dressings, where its gel-forming and moisture-retentive properties support wound healing applications.
Technical Specifications
Sodium Alginate — Key Properties
Why Source Sodium Alginate from Polychem Industries?
- Food Grade (E401) and Industrial/Textile Grade available
- FSSAI compliant Food Grade supply with Certificate of Analysis
- Naturally derived from seaweed — valued for clean-label formulations
- Reliable bulk supply for food and textile printing manufacturers
- Competitive pricing with consistent year-round availability
- Export documentation experience for international shipments
