Other
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: > Other: > Other
Duty Rate (from China)
Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 3913.90.50.00
Sodium Carboxymethyl Cellulose Powder
Sodium carboxymethyl cellulose (CMC) is a chemically modified derivative of cellulose, a natural polymer, supplied in primary powder form for use in food, pharmaceuticals, and industrial applications as a thickener and stabilizer. It falls under HTS 3913.90.5000 as a modified natural polymer not elsewhere specified in primary forms.
Hydroxypropyl Methylcellulose Granules
Hydroxypropyl methylcellulose (HPMC) is a semi-synthetic derivative of cellulose used in primary granule form for coatings, capsules, and construction mortars. Classified under HTS 3913.90.5000 as a modified natural polymer in primary form, not covered elsewhere.
Alginic Acid Powder
Alginic acid, extracted from brown seaweed, is a natural polymer in primary powder form used in food gelling and pharmaceutical encapsulation. It is classified in HTS 3913.90.5000 as a natural polymer not elsewhere specified.
Sodium Alginate Flakes
Sodium alginate, a salt derivative of alginic acid, is provided in primary flake form for textile printing and food thickening applications. Falls under HTS 3913.90.5000 as a modified natural polymer.
Casein Modified Powder
Chemically hardened casein protein, derived from milk, in primary powder form for industrial coatings and adhesives. Classified under HTS 3913.90.5000 as hardened proteins, a modified natural polymer.
Methylcellulose Pharmaceutical Grade
Pharmaceutical-grade methylcellulose, a cellulose ether derivative, supplied in primary form for tablet coatings and viscosifiers. HTS 3913.90.5000 covers this modified natural polymer.
Guar Gum Derivative Powder
Hydroxypropyl guar, a modified form of guar gum natural polymer, in primary powder for fracturing fluids in oilfield applications. Classified as other modified natural polymers under HTS 3913.90.5000.
Chitosan Flakes
Chitosan, deacetylated chitin from crustacean shells, is a natural polymer in primary flake form for water treatment and biomedical uses. HTS 3913.90.5000 for other natural polymers.
Locust Bean Gum Modified
Chemically modified locust bean gum from carob seeds, in primary form for food stabilizers. As a modified natural polymer, classified under HTS 3913.90.5000.
Xanthan Gum Primary Form
Xanthan gum, produced by bacterial fermentation on natural sugars but classified as modified natural polymer, in primary powder for food and oil recovery. HTS 3913.90.5000 applies.