3815.19.00.00
Other
Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included: Supported catalysts
Data provenance: Rates from HTS Revision 16 (Aug 15, 2026); trade measures verified against CBP CSMS and Federal Register notices through Aug 15, 2026.
Duty rates
Column 1 (General / MFN)
Free
Column 2 (Non-NTR)
25%
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.90.08
35%
ActiveArticles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Applies to origin: RU, BY
Effective from April 5, 2025
Rate-change history
What the rate was before, and when it changed. The government schedule replaces each revision in place; we keep the timeline.
-
NEW_PROGRAM Executive Order Feb 1, 2026 — Reciprocal Tariff (FR 2026-03824)
Section 122 reciprocal surcharge in effect — additional 10% on most imports through July 24, 2026
See the change → -
Base rate HTS 2023
Column 1 general rate set to Free.
Related CBP rulings
The tariff classification of cationic photoinitiators from Mexico
Additional information was provided via email on January 4, 2021. The two products under consideration are identified as CPI-6976 (also referred to as UVI-6976) and CPI-6992 ( also referred to as UVI 6992). They are cationic photoinitiators
Mattresses; USMCA; De Minimis
The merchandise at issue a king-size foam mattress with a quilted cover, identified as “US Comfort Grande Refresh - KG.” The mattress cover is made of a rayon and polyester blend and utilizes a zippered opening to cover the mattress core. T
United States-Korea Free Trade Agreement (“UKFTA”); 2-Hydroxyethyl Methacrylate (2HEMA); Self-Produced Materials
Kowa imported the subject merchandise, 2HEMA, on January 7, 2018 from Korea. The port denied Kowa’s UKFTA preferential claim due to lack of raw material receipts and factory production records. The entry was liquidated on April 20, 2018. Ac
The tariff classification and country of origin of Spray Dried Copper Zeolite Catalysts from various countries; Article 509.
The tariff classification and country of origin of Spray Dried Copper Zeolite Catalysts from various countries; Article 509.
The tariff classification of LESA 74070 and LESA 74071 from Canada or Mexico
Your inquiry was submitted to the U.S. Customs and Border Protection laboratory for analysis. Additional information was provided via email on September 21 and 22, 2018. The analysis is now complete. The products under consideration are BET
The country of origin of birch-faced, parica plywood panels
The country of origin of birch-faced, parica plywood panels
The tariff classification of “NC-25” from Japan Correction to Ruling Number N281144
” You have indicated that the product at issue is a polymerization initiator, intended to be used in the manufacture of automotive paints and coatings. Your submission describes the chemical composition as: CAS number 2638-94-0: 4, 4’-Azobi
The tariff classification of “NC-25” from Japan
” You have indicated that the product at issue is a polymerization initiator, intended to be used in the manufacture of automotive paints and coatings. Your submission describes the chemical composition as: CAS number 2638-94-0: 4, 4’-Azobi
The tariff classification of “Mn-OCTOATE 8%” from Japan.Correction to Ruling Number N280253
” You have indicated that the product at issue is a chemical additive, intended to be used in the manufacture of automotive paints. You provided additional information via e-mail, which indicates that “Mn-OCTOATE 8%” is a reaction accelerat
The tariff classification of “12% Zr-OCTOATE” from Japan.Correction to Ruling Number N280275
” You have indicated that the product at issue is a chemical additive, intended to be used in the manufacture of automotive paints. You provided additional information via e-mail, which indicates that “12% Zr-OCTOATE” is a reaction accelera
The tariff classification of “Mn-OCTOATE 8%” from Japan
” You have indicated that the product at issue is a chemical additive, intended to be used in the manufacture of automotive paints. You provided additional information via e-mail, which indicates that “Mn-OCTOATE 8%” is a reaction accelerat
The tariff classification of “12% Zr-OCTOATE” from Japan
” You have indicated that the product at issue is a chemical additive, intended to be used in the manufacture of automotive paints. You provided additional information via e-mail, which indicates that “12% Zr-OCTOATE” is a reaction accelera
Other codes in heading 3815
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 3815.19.00.00 from each major US trading partner.
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