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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If degree of substitution exceeds typical natural polymer thresholds
High substitution may classify it as carboxymethylcellulose under synthetic polymers of heading 3912 rather than modified natural.
If imported as prepared binder or adhesive
If pre-formulated as a starch-based adhesive rather than primary form, it shifts to Chapter 35 for dextrins and glues.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify chemical modification details and purity certificates to confirm classification as modified natural polymer; ensure compliance with FDA regulations if for food/pharma use; avoid misclassification as synthetic under Chapter 39 by providing monomer analysis
Related Products under HTS 3913.90.50.00
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.