What Is The Difference Between Alginic Acid Powder And Sodium Alginate Powder?

what is Alginic Acid Powder?

Alginic acid powder is widely present in the cell walls of brown algae, such as giant kelp and rockweed; in its pure form, it typically appears as a white powder. It is nearly insoluble in cold water, methanol, and ethanol, yet it dissolves rapidly in alkaline solutions-such as sodium hydroxide-to form highly viscous colloids.

Its molecules are composed of β-D-mannuronic acid and α-L-guluronic acid linked linearly via glycosidic bonds. Due to its excellent biocompatibility and film-forming properties, it is widely recognized as a safe, non-toxic natural polymeric material.

alginic acid benefits:

1. Promotes Wound Healing

Upon contact with wound exudate, it can absorb liquid exceeding 20 times its own weight, rapidly forming an occlusive gel layer that maintains a moist environment and accelerates epidermal cell regeneration.

2. High Biocompatibility

The human body lacks the enzymatic systems required to degrade this polysaccharide, allowing it to serve directly as an implant-grade medical biomaterial; furthermore, it is non-toxic and non-irritating.

3. Regulates Plant Growth

As a core active ingredient in seaweed fertilizers, alginic acid bulk effectively stimulates the balance of endogenous hormones in crops, significantly enhancing their resistance to drought, cold, and pests.

4. Rapid Blood Coagulation

When compounded with glycerol, high-molecular-weight alginate significantly increases blood viscosity and induces rapid gelation, thereby effectively preventing fluid leakage.

alginic acid uses:

1. Pharmaceutical Formulations

It serves as both a binder and a disintegrant at concentrations of 1%–5% in tablets and capsules, and is used in combination with H2 receptor antagonists for the treatment of gastroesophageal reflux.

2. Food Industry

It is widely incorporated into ice cream, noodles, and jams, where it functions to thicken, stabilize, and emulsify products, as well as to prevent drying and cracking.

3. Novel Care Materials

Alginate glycerin powder has been innovatively applied in menstrual care products, where it effectively locks in menstrual fluid and inhibits the growth of Staphylococcus aureus.

4. Agriculture

Applied to soil or foliage in the form of a concentrate or powder, it promotes root development, improves soil aggregate structure, and enhances fertilizer utilization efficiency.

The difference between alginic acid and sodium alginate:

Contrast	Alginic acid	Sodium alginate powder
Chemical Properties	In the free acid form; acidic.	The sodium salt of alginic acid; its aqueous solution is neutral.
Solubility	Insoluble in water and common organic solvents; soluble only in alkaline solutions.	Highly soluble in water, forming a high-viscosity colloidal solution.
Appearance	Light yellow powder	White to light yellow powder
Uses	Pharmaceutical and Agricultural field	Food, Medical, and Textile field

About us:

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Our products are sold to North America, Europe, Australia, South America and Asia. Our products have passed quality inspection and also support customer re-inspection. If you would like to buy alginic acid powder, please contact us: Email: info@fruiterco.com.