How do I classify a chemical mixture?

If a mixture contains a specifically named chemical as its main component, it may classify under that chemical's heading. Otherwise, mixtures generally fall under 3824 (chemical preparations n.e.s.) or the heading for the preparation type. Camtom analyzes composition to determine the correct heading.

Does Camtom check for antidumping duties on chemicals?

Yes. Camtom cross-references your HTS code and country of origin against active AD/CVD orders. Many commodity chemicals from China, India, and other countries carry significant AD/CVD duties that can exceed the product value.

Are CAS numbers required for classification?

CAS numbers are not required by CBP but dramatically improve classification accuracy. Camtom uses CAS numbers to match chemicals to their specific eo nomine heading in Chapters 28/29, ensuring the most accurate classification.

How are polymers classified?

Polymers in primary forms (granules, powder, liquid) classify under Chapter 39 by their monomer type. Copolymers classify by the monomer that predominates by weight. Articles made of plastics classify under their specific use heading. Camtom determines the correct classification for each form.

Can a chemical classification affect regulatory compliance?

Absolutely. HTS classification determines TSCA reporting obligations, EPA pesticide registration requirements, and DEA controlled substance screening. Camtom flags regulatory implications alongside the tariff classification.

How do I classify a chemical mixture?

If a mixture contains a specifically named chemical as its main component, it may classify under that chemical's heading. Otherwise, mixtures generally fall under 3824 (chemical preparations n.e.s.) or the heading for the preparation type. Camtom analyzes composition to determine the correct heading.

Does Camtom check for antidumping duties on chemicals?

Yes. Camtom cross-references your HTS code and country of origin against active AD/CVD orders. Many commodity chemicals from China, India, and other countries carry significant AD/CVD duties that can exceed the product value.

Are CAS numbers required for classification?

CAS numbers are not required by CBP but dramatically improve classification accuracy. Camtom uses CAS numbers to match chemicals to their specific eo nomine heading in Chapters 28/29, ensuring the most accurate classification.

How are polymers classified?

Polymers in primary forms (granules, powder, liquid) classify under Chapter 39 by their monomer type. Copolymers classify by the monomer that predominates by weight. Articles made of plastics classify under their specific use heading. Camtom determines the correct classification for each form.

Can a chemical classification affect regulatory compliance?

Absolutely. HTS classification determines TSCA reporting obligations, EPA pesticide registration requirements, and DEA controlled substance screening. Camtom flags regulatory implications alongside the tariff classification.

HTS Classification by industry

HTS Classification for Chemicals

Chemical imports span from basic inorganic compounds (Ch. 28) to complex organic molecules (Ch. 29), industrial preparations (Ch. 38), and specialty products like paints, adhesives, and cosmetics. Classification requires knowledge of chemical nomenclature, CAS numbers, molecular structure, and purity levels. A misclassified chemical can result in wrong duty rates, missed antidumping duties, and TSCA compliance failures. Camtom maps chemical identity to the correct HTS code.

Classification challenges in your industry

Matching chemical products to their correct HTS subheading using CAS numbers, IUPAC names, and molecular formulas

Distinguishing between pure chemicals (Ch. 28/29) and preparations/mixtures (Ch. 38) based on composition

Navigating antidumping and countervailing duties on commodity chemicals from specific countries (e.g., Chinese silicones, Indian glycine)

Classifying specialty chemicals that straddle categories — a chemical that functions as both a pesticide and a pharmaceutical intermediate

Complying with TSCA, EPA, and REACH requirements that interact with customs classification decisions

Common classification mistakes

Classifying a chemical mixture under the heading for its main component rather than 3824 (chemical preparations n.e.s.)

Missing antidumping duties on commodity chemicals by using an HTS code that is not covered by the AD order

Using a generic subheading for an organic chemical that has its own specific eo nomine heading in Chapter 29

Treating a polymer in primary form (Ch. 39) as a chemical preparation (Ch. 38) based on packaging rather than chemical structure

Failing to identify isomers that classify under different subheadings despite having the same molecular formula

Key HTS chapters

Chapter 28 — Inorganic chemicals

Chapter 29 — Organic chemicals

Chapter 32 — Dyes, paints, inks

Chapter 34 — Soap, surfactants

Chapter 38 — Chemical products n.e.s.

Chapter 39 — Plastics in primary forms

Duty rate range

Most basic chemicals enter at 0-6.5% MFN. Specialty chemicals and preparations under Ch. 38 face 0-6.5%. Antidumping duties on Chinese chemicals can add 50-300% on specific products. USMCA and other FTAs offer 0% on qualifying chemicals.

Rules of origin

Under USMCA, chemicals qualify through chemical reaction rules — if the product undergoes a qualifying chemical reaction within a USMCA country, it meets origin requirements. Mixing, blending, and diluting alone do not qualify. A USMCA certificate of origin is required.

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