Alginic acid, its salts and esters
Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms: > Alginic acid, its salts and esters
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
Products classified under HTS 3913.10.00.00
Sodium Alginate Powder
Sodium alginate is the sodium salt of alginic acid, a natural polysaccharide extracted from brown seaweed, appearing as a white to yellowish powder in primary form. It falls under HTS 3913.10.00.00 as a salt of alginic acid not elsewhere specified. Primarily used in food, pharmaceutical, and textile industries for its gelling and thickening properties.
Calcium Alginate Granules
Calcium alginate consists of calcium salts of alginic acid in granular primary form, derived from brown algae for use in wound dressings and food applications. Classified under HTS 3913.10.00.00 as an alginic acid salt in primary form. It forms gels upon contact with sodium ions, ideal for biomedical uses.
Propylene Glycol Alginate (PGA)
Propylene glycol alginate is an ester of alginic acid partially esterified with propylene glycol, supplied as a powder for food and beverage stabilization. It qualifies under HTS 3913.10.00.00 as an ester of alginic acid in primary form. Commonly used as an emulsifier in salad dressings and beer foam stabilizer.
Alginic Acid Powder
Pure alginic acid in powdered primary form, extracted and purified from brown seaweeds like Laminaria species. Directly classified under HTS 3913.10.00.00 as alginic acid itself. Used in research, pharmaceuticals, and as a raw material for salt/ester production.
Potassium Alginate Flakes
Potassium alginate, a salt of alginic acid, provided in flake form from Ascophyllum nodosum seaweed for industrial thickening. Falls under HTS 3913.10.00.00 as an alginic salt in primary form. Applied in printing pastes and reactive dye systems.
Ammonium Alginate Solution Concentrate
Concentrated aqueous solution of ammonium alginate, a salt of alginic acid, in primary form for further processing. Classified in HTS 3913.10.00.00 as an alginic acid salt. Used in welding rod coatings and ceramics.
Textile Grade Sodium Alginate
High-viscosity sodium alginate powder specifically for reactive printing on cotton fabrics, derived from Macrocystis pyrifera. Under HTS 3913.10.00.00 as alginic salt in primary form. Provides sharp print definition and easy wash-off.
Food Grade Propylene Glycol Alginate
Food-grade PGA ester of alginic acid, meeting FCC standards, in powdered form for ice cream stabilization. HTS 3913.10.00.00 covers this alginic ester in primary form. Prevents ice crystal formation and improves mouthfeel.
Pharmaceutical Grade Calcium Alginate
USP-grade calcium alginate powder for antacid tablets and encapsulation, sourced from controlled algae harvests. Classified under HTS 3913.10.00.00 as primary alginic salt. Offers slow-release properties for drug delivery.
Surgical Grade Sodium Alginate
Sterile sodium alginate powder for dental impression materials and hemostatic agents in primary form. HTS 3913.10.00.00 for alginic salts; used in alginate impression pastes mixed with calcium sulfate. Biocompatible and biodegradable.