Industrial CMC Viscosifier Grade
Industrial-grade carboxymethylcellulose sodium serves as a viscosifier in oil drilling fluids and ceramics. It qualifies for HTS 3912.31.00.90 as other CMC salts in primary powder form per chapter polymer classification rules. Essential for high-viscosity applications in manufacturing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for oil drilling as prepared additive
Refractory cements/mortars with polymers go to 3816 if for specific end-use.
If blended with other cellulose ethers
Polymer blends classify by predominant monomer; non-CMC dominant shifts subheading.
If surface-active preparations containing CMC
Organic surface-active agents incorporating polymers move to Chapter 34.
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Import Tips & Compliance
• Include viscosity specs and substitution degree in docs to distinguish from lower-grade 'Other' celluloses
• Avoid bulk packaging over retail limits to stay out of 3923; use industrial drums
Related Products under HTS 3912.31.00.90
CMC Sodium Salt for Detergents
Carboxymethylcellulose sodium salt prevents soil redeposition in laundry detergents. Classified HTS 3912.31.00.90 as other CMC salts in primary granular form for industrial use. Meets chapter notes for pure cellulose ether polymers.
High-Purity CMC for Cosmetics
High-purity carboxymethylcellulose sodium for cosmetic creams and lotions as a rheology modifier. HTS 3912.31.00.90 covers this as other CMC salts in primary form, with >95% polymer content. Used in personal care formulations.
Technical Grade CMC Flakes
Technical-grade CMC in flake form for paper sizing and textile printing. Falls under HTS 3912.31.00.90 as other carboxymethylcellulose salts per predominant monomer rule. Primary form for industrial processing.
Pharma-Grade Cross-Linked CMC
Cross-linked sodium carboxymethylcellulose for controlled-release drug matrices. Still primary polymer under HTS 3912.31.00.90 as chemically modified CMC salt per subheading note (a)(3). Imported for advanced pharma applications.
Battery CMC Binder Powder
CMC sodium binder for lithium-ion battery electrode slurries. HTS 3912.31.00.90 as other carboxymethylcellulose salt in primary form for electronics manufacturing. Critical for EV battery production.
Sodium Carboxymethylcellulose (CMC) Powder
Sodium carboxymethylcellulose (CMC) is a water-soluble cellulose ether derivative used as a thickener and stabilizer in food and pharmaceuticals. It falls under HTS 3912.31.00.90 as 'Other' carboxymethylcellulose and its salts in primary form, not specifically named elsewhere in the subheading. This powdered form is imported for industrial formulation.