High-Quality Leading Chinese Sodium Alginate Manufacturer

As a premier manufacturer of sodium alginate in China, we specialize in producing high-quality sodium alginate derived from natural seaweed. Our state-of-the-art facility employs advanced extraction techniques, ensuring a pure and consistent product. Committed to environmental sustainability, we adhere to eco-friendly practices throughout our production process. Our sodium alginate is widely used in various industries, including food, pharmaceuticals, and textiles, for its thickening, stabilizing, and emulsifying properties. We pride ourselves on our rigorous quality control measures, ensuring that each batch meets international standards. Our dedicated research and development team continuously innovates, enhancing product efficiency and versatility. Partnering with clients globally, we provide tailored solutions to meet diverse industry needs, emphasizing customer satisfaction and timely delivery.

sodium alginate manufacturer
High-Quality Leading Chinese Sodium Alginate Manufacturer

As a leading Chinese manufacturer of sodium alginate, we pride ourselves on our state-of-the-art production facilities and robust supply capabilities. Our advanced technology and streamlined processes ensure the highest quality sodium alginate, catering to diverse industries worldwide. With a strong commitment to innovation, we continuously upgrade our methods to meet evolving market demands.

Our extensive production capacity enables us to handle large-scale orders with ease, ensuring prompt and reliable delivery. Our experienced team, dedicated to excellence, works tirelessly to maintain our reputation as a dependable supplier. We are committed to providing top-grade sodium alginate, ensuring our clients receive the best product for their needs.

Emphasizing customer satisfaction, we offer customized solutions and attentive service, making us a preferred choice for sodium alginate requirements globally. Our dedication to quality, capacity for large-scale production, and reliable supply chain positions us as a leader in the sodium alginate industry.

Sodium Alginate FEATURES

Sodium Alginate, a versatile polysaccharide derived from brown seaweed, is renowned for its unique properties and wide-ranging applications. Its remarkable ability to form gels, even at low temperatures, makes it an indispensable ingredient in the food industry, particularly for thickening, stabilizing, and forming films. In the textile sector, sodium alginate is used as a thickener for reactive dyes, enhancing precision and quality in printing.

Additionally, its biocompatibility and non-toxic nature have ushered its use in biomedical applications, including wound dressings and drug delivery systems. In the dental field, it’s a key component in making dental impressions due to its precision and ease of use.Sodium alginate’s water-absorbent property is also beneficial in agriculture as a soil conditioner, aiding water retention and nutrient delivery. Its natural origin, biodegradability, and functionality make it a highly sought-after compound in various industries, reflecting its adaptability and environmental friendliness.

Gel Formation

Sodium alginate excels in creating gels, a feature highly valued in the food industry. It can form gels at room temperature, unlike many other gelling agents that require heating. This property is crucial for cold food preparations, providing texture and consistency without altering the temperature of the dish.

Thickening Agent

In culinary and industrial applications, sodium alginate acts as an effective thickener. It enhances the viscosity of liquids, making it essential in sauces, gravies, and syrups. Its thickening ability is stable across a wide range of temperatures and pH levels, ensuring versatility in various formulations.


It stabilizes emulsions and suspensions in products like ice cream and salad dressings, preventing separation and improving shelf life. This stabilizing effect maintains the desired consistency and quality over time, essential in both food production and storage.

Film Formation

Sodium alginate forms strong, flexible films, useful in encapsulating flavors or creating edible films. This characteristic is instrumental in food preservation and in creating innovative culinary presentations, like edible wrappers or protective coatings for perishable foods.

Biomedical Applications

Its biocompatibility makes sodium alginate ideal for biomedical uses, including wound dressings and drug delivery systems. It's gentle on human tissues, and its gel-forming ability can be utilized to control drug release rates or to create molds for dental applications.

Textile Printing

In textile manufacturing, sodium alginate is predominantly used as a thickener in dye pastes, ensuring sharp, defined prints by effectively preventing dye spread. This is vital for producing intricate designs and sophisticated patterns on various types of fabrics.

Soil Conditioning

Its water absorption properties significantly benefit agriculture, aiding in enhanced water retention in soil. This aspect is especially crucial for arid regions or in soils with poor water-holding capacity, substantially enhancing plant growth and effectively reducing the need for frequent watering.

Environmental Benefits

Sodium alginate's natural origin and biodegradability make it an environmentally friendly option. It's derived from renewable seaweed sources, offering a sustainable alternative to synthetic agents in various industries, aligning with the growing demand for green products.

sodium alginate SPECIFICATION

Sodium Alginate BioChemica, with the product code A3249, is a solid compound used widely for its unique properties. Its specifications are meticulously defined to ensure quality and consistency. The assay content on a dried basis ranges between 90.8% and 106.0%, ensuring a high level of purity. The loss on drying is strictly controlled to a maximum of 15%, preserving its integrity and efficacy.

The pH level of a 1% solution in water is maintained between 5.5 and 8.0, suitable for various applications. The sulfated ash content lies between 18% and 27%, indicating the minimal inorganic residue after complete combustion. Its viscosity at 20°C in a 1% solution is measured to be between 350 and 550 mPas, signifying its ideal thickening properties.

Heavy metal content is tightly regulated, with lead (Pb) capped at a maximum of 0.0005%, arsenic (As) at 0.0003%, and overall heavy metals (as Pb) at a maximum of 0.002%. This ensures safety and compliance with health standards.

Sodium Alginate BioChemica has a molecular formula of (C6H7O6Na)n and a molecular weight ranging from 10,000 to 600,000 g/mol. Its CAS number is 9005-38-3, and the customs tariff statistic number (CS) is 39131000. Classified as WGK 1, it indicates low hazard to water. Recommended storage is at room temperature (RT), simplifying handling and storage requirements.

DEFINITIONSodium salt of alginic acid
C.A.S. number9005-38-3
Chemical formula(C6 H7 NaO6)n
Structural formulaThe number and sequence of the Mannuronate and Glucuronate residues shown above vary in the naturally occurring alginate. The water molecules associated with the alginate molecule are not shown in the above structural formula.
Formula weightStructural unit : 198.11 (theoretical), 222 (actual average)Macromolecule : 10,000 – 600,000 (typical average)
AssayYields, on the dried basis, not less than 18.0% and not more than 21.0% of carbon dioxide (CO2), equivalent to not less than 90.8% and not more than 106.0% of sodium alginate (C6H7 NaO6)n.
DESCRIPTIONWhite to yellowish brown filamentous, grainy, granular or powdered forms
FUNCTIONAL USESStabilizer, thickener, gelling agent, emulsifier
SolubilityDissolves slowly in water, forming a viscous solution; insoluble in ethanol and ether
Precipitate formation with calcium chlorideTo a 0.5% solution of the sample in sodium hydroxide TS add one-fifth of its volume of a 2.5% solution of calcium chloride. A voluminous, gelatinous precipitate is formed. This test distinguishes sodium alginate from gum arabic, sodium carboxymethyl cellulose, carrageenan, gelatin, gum ghatti, karaya gum, carob bean gum, methyl cellulose and tragacanth gum.
Precipitate formation with ammonium sulphateTo a 0.5% solution of the sample in sodium hydroxide TS add one-half of its volume of a saturated solution of ammonium sulfate. No precipitate is formed. This test distinguishes sodium alginate from agar, sodium carboxymethyl cellulose, carrageenan, de-esterified pectin, gelatin, carob bean gum, methyl cellulose and starch.
Loss on dryingNot more than 15% (105o, 4 h)
Water-insoluble matterNot more than 2% on the dried basisSee description under TESTS
ArsenicNot more than 3 mg/kg (Method II)
LeadNot more than 5 mg/kgDetermine using an atomic absorption technique appropriate to the specified level. The selection of sample size and method of sample preparation may be based on the principles of the method described in Volume 4, “Instrumental Methods.”
Microbiological criteriaTotal plate count: Not more than 5,000 colonies per gram.Initially prepare a 10-1 dilution by adding a 50 g sample to 450 ml of Butterfield’s phosphate buffered dilution water and homogenizing in a high speed blender.Yeasts and moulds: Not more than 500 colonies per gramColiforms: Negative by testSalmonella: Negative by test
Water-insoluble matterDisperse 2 g of the sample, weighed to the nearest 0.1 mg, in 800 ml of water in a 2,000-ml flask. Neutralize to pH 7 with sodium hydroxide TS and then add 3 ml in excess. Add 40 ml of hydrogen peroxide solution containing 30% by weight H2O2, cover the flask and boil for 1 h with frequent stirring. Filter while hot through a tared Gooch crucible provided with a glass fibre filter (2.4 cm, No 934 AH, Reeve Angel & Co, Clifton, N.Y.,USA, or equivalent). If slow filtration is caused by high viscosity of the sample solution, boil until the viscosity is reduced enough to permit filtration. Wash the crucible thoroughly with hot water, dry the crucible and its contents at 105o for 1 h, cool and weigh. Calculate as percentage of the dry weight.
METHOD OF ASSAYProceed as directed under Carbon Dioxide Determination by Decarboxylation. Each ml of 0.25 N sodium hydroxide consumed is equivalent to 5.5 mg of carbon dioxide (CO2) or 27.75 mg of sodium alginate (equivalent weight 222).

sodium alginate uses

Sodium alginate, a versatile biopolymer, is extensively utilized across various industries due to its unique properties. In the food industry, it is a popular additive, used in over 50 different products for thickening, gelling, and stabilizing. It’s crucial in the production of ice cream, where it prevents ice crystal formation, and in dairy products like cheese and yogurt, enhancing texture.

In the pharmaceutical sector, sodium alginate is incorporated into over 100 different products, serving as a stabilizer in antacids and as a controlled-release medium in oral medications. It’s also used in wound dressings for its excellent biocompatibility and gel-forming ability.

The textile industry employs sodium alginate in over 30 different fabric printing applications, where it acts as a thickener for reactive dyes, ensuring sharp, defined patterns.

In agriculture, it’s used as a soil conditioner, benefiting over 40 different crop types by improving water retention and nutrient delivery.

Additionally, its water treatment applications span over 20 processes, aiding in heavy metal removal and water purification. Sodium alginate’s diverse applications, spanning hundreds of products and processes, underscore its multifaceted utility and significance in modern industry.

sodium alginate faq

Sodium alginate, derived primarily from brown seaweed, is a versatile polysaccharide widely utilized in various industries due to its unique properties. As a leading manufacturer, we specialize in producing high-quality sodium alginate, offering a range of viscosities and grades to meet diverse needs. Our state-of-the-art facilities ensure consistent, superior quality, catering to applications in food, pharmaceuticals, textiles, and more. We’re committed to sustainable practices and innovation, constantly evolving to meet global standards and customer expectations. Our expertise and dedication make us a trusted partner in the sodium alginate market.

Our sodium alginate is used in the food, pharmaceutical, textile, and cosmetic industries, among others, for its gelling, thickening, and stabilizing properties.

Yes, sodium alginate is safe for consumption and is often used in food products. It’s generally recognized as safe (GRAS) by the FDA.

Yes, our sodium alginate can be used in organic products, as it is a naturally derived ingredient.

We offer various grades of sodium alginate, including food grade, pharmaceutical grade, and industrial grade, each tailored to specific applications.

Yes, we prioritize sustainability in our production processes, sourcing seaweed from sustainable farms and employing eco-friendly methods.

Absolutely, we can customize the viscosity and purity of sodium alginate to meet specific application requirements.

We have strict quality control measures in place, including regular testing and adherence to international standards, to ensure the highest quality of our product.

Sodium alginate typically has a shelf life of 2 years when stored in a cool, dry place away from direct sunlight.

sodium alginate price

Sodium alginate, a versatile and natural polysaccharide extracted from brown seaweed, is highly valued in numerous industries for its gelling, thickening, and stabilizing properties. Its price can vary depending on purity, grade, and viscosity. Factors influencing cost include the quality of seaweed, processing methods, and market demand. Widely used in food, pharmaceuticals, textiles, and cosmetics, sodium alginate’s price is also affected by global seaweed harvest yields and environmental regulations. Purchasers often find that higher grades, such as pharmaceutical or food-grade, command premium prices due to stricter quality and purity standards.

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