Sodium Alginate
Sodium alginate is a natural polysaccharide used as a thickening and gelling agent in various industries.
Sodium Alginate
- CAS Number: 9005-38-3
- EINECS NO.: 618-238-3
- Molecular Formula: (C6H7NaO6)n
- Purity (%): Typically 95% or higher
- Appearance: white or light yellow powder or granule
- Packing: 25kgs/bag or as custmer’s request.
- Other Name: Algin, Alginic Acid Sodium Salt, Algin Gum, E 401
Sodium Alginate Specification
| ITEMS | SPECIFICATIONS |
| Viscosity(mPa·s) | ≤150 |
| Moisture % | ≤15 |
| PH Value | 6.0-8.0 |
| Ash content % | 18-27 |
| Insoluble Matter in water % | ≤0.6 |
| Heavy Metal % | ≤0.0004 |
| Arsenate % | ≤0.0002 |
| Lead % | ≤0.0004 |
| Grain Size | 120-200mesh |
| ITEMS | SPECIFICATIONS |
| Viscosity(mPa·s) | 150-400 |
| Moisture % | ≤15 |
| PH Value | 6.0-8.0 |
| Ash content % | 18-27 |
| Insoluble Matter in water % | ≤0.6 |
| Heavy Metal % | ≤0.0004 |
| Arsenate % | ≤0.0002 |
| Lead % | ≤0.0004 |
| Grain Size | 120-200mesh |
| ITEMS | SPECIFICATIONS |
| Viscosity(mPa·s) | ≥400 |
| Moisture % | ≤15 |
| PH Value | 6.0-8.0 |
| Ash content % | 18-27 |
| Insoluble Matter in water % | ≤0.6 |
| Heavy Metal % | ≤0.0004 |
| Arsenate % | ≤0.0002 |
| Lead % | ≤0.0004 |
| Grain Size | 120-200mesh |
High Viscosity for Pharmaceuticals & Cosmetics: High viscosity sodium alginate is used as a thickener in medicines to make them easier to take and apply, and in creams, lotions, and shampoos to improve texture and moisture retention .
Medium Viscosity for Industrial & Food Use: Medium viscosity grades provide balanced thickening and gel formation, commonly used in textile printing pastes, paper coatings, and as stabilizers in sauces and dressings.
Low Viscosity for Oil & Water Treatment: Low viscosity sodium alginate acts as a fluid control agent in oil drilling to adjust well fluid viscosity and manage flow pressure. In wastewater treatment, it speeds up suspended solids settling for better clarification.
Gelling Agent Across All Industries: Regardless of viscosity, sodium alginate forms stable gels when combined with calcium ions, making it valuable for creating gels in food (desserts, jams), pharmaceuticals (wound dressings, dental impressions), and biomedical applications (cell encapsulation).
Sodium Alginate for Sale
| Feature | White Powder | Light Yellow Powder (with Granules) |
| Production Process | Made by liquid-phase method — alginic acid reacted with sodium hydroxide in alcohol solution. Alcohol acts as a bleaching agent. | Made by solid-phase method — alginic acid crushed and reacted with solid soda ash. No alcohol bleaching, so natural color remains. |
| Purity | Higher purity, fewer impurities | Contains some impurities, color darker |
| Best Applications | Food grade — used in food, medicine, and high-purity applications | Industrial grade — used in textile printing, dyeing, and general industrial uses |
| Cost | Higher production cost, more expensive | Lower production cost, more economical |
Key Advantages of Sodium Alginate:
Natural & Safe Origin: Sodium Alginate is a natural polysaccharide extracted from brown seaweed, making it safe, non-toxic, and biocompatible for food and pharmaceutical applications.
Excellent Thickening & Gelling Properties: It dissolves easily in water to form stable, viscous solutions and creates firm gels when combined with calcium ions, ideal for texture control in various products.
Versatile Food & Pharma Applications: Widely used as a thickener, stabilizer, and emulsifier in ice cream, sauces, and desserts, and in pharmaceuticals for wound dressings, dental impressions, and controlled-release medications.
Superior Industrial Performance: In textile printing, it ensures bright colors, clear patterns, and easy wash-out without reacting with dyes, making it the preferred thickener for reactive dye printing.
Two Grades for Every Need: We supply both food-grade white powder for high-purity applications and industrial-grade light yellow powder for cost-effective use in textiles, paper, and other industries.
What is Sodium Alginate Used for
Food Industry: Serves as a natural thickener, stabilizer, and gelling agent in ice cream, yogurt, sauces, dressings, and jams. Also used in molecular gastronomy for creating spheres and gels.
Pharmaceutical Industry: Functions as a binder and controlled-release agent in tablets and capsules. Used in liquid medicines as a thickener and in reflux treatments to create a protective foam barrier.
Textile Industry: Acts as a thickener for reactive dye printing pastes, ensuring bright colors and sharp patterns while washing out easily without affecting dyes.
Petroleum Industry: Used as a fluid control agent in oil drilling to adjust well fluid viscosity and manage flow pressure. Helps improve oil recovery efficiency.
Cosmetics Industry: Found in creams, lotions, masks, and shampoos as an emulsifier and thickener, improving texture and moisture retention.
Biotechnology & Medical: Used for cell encapsulation, tissue engineering, and as a material for wound dressings that absorb fluid and promote healing.
Dental & Medical Applications: Employed in dentistry for making precise dental impressions and in alginate-based wound dressings for moisture management.
FAQ of Sodium Alginate
Sodium alginate is safe and good for you when used as intended. It is a natural substance from brown seaweed and is approved by the FDA as a Generally Recognized as Safe (GRAS) food ingredient. It is non-toxic, with an oral LD50 greater than 5000 mg/kg in rats. It is widely used in foods, medicines, and cosmetics without health concerns.
Yes, it is hygroscopic. Our packaging uses moisture-proof liners to protect product quality during sea transport, especially important for humid shipping routes.
Free Samples Available: Contact us to request a free sample and test our Sodium Alginate quality in your own formulations before ordering.
It dissolves slowly and needs stirring. For best results, sprinkle powder into cold or warm water while mixing vigorously to avoid clumping. Hot water speeds dissolution but may reduce viscosity.
Sodium Alginate Supplier - HOO CHEMTEC
HOOCHEMTEC: Your Trusted Sodium Alginate Manufacturer & Exporter
We are a direct manufacturer of high-quality Sodium Alginate, with our own production facility dedicated to extracting and processing this natural polymer from brown seaweed. Our vertical integration gives us complete control over quality, from raw material selection to finished product.
Product Excellence Across Grades:
We produce Sodium Alginate in white food-grade powder for pharmaceutical and food applications, and light yellow industrial-grade powder for textile and industrial uses. Both are available in low, medium, and high viscosity options to match your specific formulation needs. Every batch is tested in our laboratory to ensure consistent quality.
Global Export Expertise:
With years of experience shipping to customers across Asia, Europe, the Americas, and the Middle East, we understand the documentation and logistics requirements for international trade. Sodium Alginate is non-hazardous, making shipping straightforward. We provide all necessary paperwork — commercial invoices, packing lists, Certificates of Analysis, and customs clearance documents.
Quality and Service You Can Count On:
Our team communicates clearly and responds quickly to inquiries. We offer free samples for pre-order testing, flexible packaging options, and reliable delivery schedules. Whether you need small trial quantities or full container loads, we are here to support your business.
Choose HOOCHEMTEC for quality Sodium Alginate and a partnership you can trust.
