HS Heading 3815 : Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included
HEADING DEFINITION & DISAMBIGUATION
HS Heading 3815 encompasses reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included. It classifies 4 6-digit WCO subheadings within Chapter 38 under the Harmonized System [USITC HTS 2026].
Subheadings Under Heading 3815
| HS Code | WCO 6-Digit Subheading Description | Chapter | Operational Package |
|---|---|---|---|
| 3815.11 | Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Supported catalysts, With nickel or nickel compounds as the active substance | 38 | View 3815.11 Package → |
| 3815.12 | Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Supported catalysts, With precious metal or precious metal compounds as the active substance | 38 | View 3815.12 Package → |
| 3815.19 | Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Supported catalysts, Other | 38 | View 3815.19 Package → |
| 3815.90 | Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, Other | 38 | View 3815.90 Package → |
DISAMBIGUATION & CLASSIFICATION GUIDE
How to Select the Correct Subheading Under Heading 3815
Commercial shipments must be declared under the exact 6-digit WCO subheading that matches physical, chemical, or processing characteristics. Review the subheading descriptions above and verify against binding CBP CROSS rulings prior to entry filing.
Official Primary Sources & Authority References
USITC HTS Heading 3815 ↗
United States International Trade Commission official Harmonized Tariff Schedule.
CBP CROSS Rulings ↗
CBP e-Rulings database for Heading 3815 precedent rulings.
WCO Nomenclature ↗
World Customs Organization Harmonized System 2022 nomenclature standard.
U.S. Census Foreign Trade ↗
U.S. Census Bureau HTS-to-NAICS concordance and Schedule B export database.
Heading 3815 Frequently Asked Questions (FAQ)
What commercial articles are grouped under HS Heading 3815?
HS Heading 3815 covers Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included, grouping 4 6-digit WCO subheadings.
How are 6-digit subheadings structured under Heading 3815?
Subheadings under Heading 3815 range from 3815.11 to 3815.90, classifying goods by processing state, origin, or material composition.
What is the representative US import duty rate for Heading 3815?
US MFN general duty rates for Heading 3815 commodities range from Duty-Free up to representative ad valorem percentages under the 2026 US HTS.
Are Section 301 tariffs applicable to goods under Heading 3815?
Section 301 additional tariffs depend on the specific 8-digit or 10-digit US HTS code and country of origin (e.g. China Lists 1–4A).
What PGA message set flags apply to Heading 3815?
Partner Government Agency flags (FDA, USDA APHIS, EPA) apply depending on the specific commodity sub-classification.
How do I distinguish between subheadings under Heading 3815?
Review WCO subheading terms and candidate descriptions. For example, unroasted vs. roasted or decaffeinated vs. non-decaffeinated.
Can goods under Heading 3815 enter duty-free under USMCA?
Yes. Goods originating in USMCA territories (US, Mexico, Canada) enter duty-free under SPI code P with a valid Certificate of Origin.
What is the Section 321 de minimis limit for Heading 3815?
Eligible import shipments valued at $800 USD or less imported by one person on one day enter duty-free under 19 U.S.C. 1321.
What documents are required for formal customs entry of Heading 3815?
Commercial Invoice, Packing List, Bill of Lading, and CBP Form 7501 are mandatory for entries exceeding $2,500 USD.
How can an importer get a binding CBP classification ruling for Heading 3815?
Importers may apply for a binding ruling via CBP National Commodity Specialist Division under 19 CFR Part 177.