2519.90.50.00
Other
Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure: Other
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)
15.4¢/kg
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 Tripotassium Phosphate (CAS # 7778-53-2), Monopotassium Phosphate (CAS# 7778-77-0), Magnesium Hydroxide (CAS# 1309-42-8), Xanthan Gum (X-Gum), and Fused Magnesium Oxide.
The first product is described as Tripotassium Phosphate (CAS # 7778-53-2), the second product is described as Monopotassium Phosphate (CAS# 7778-77-0), the third product is described as Magnesium Hydroxide (CAS# 1309-42-8), the fourth prod
The tariff classification of magnesium oxide from ChinaDear Ms. Lin:
This sample was submitted to our Customs laboratory for analysis. Laboratory analysis of the sample confirms that this merchandise is magnesium oxide.
The tariff classification of two forms of magnesium oxide from Japan
You indicated in a telephone conversation that although you submitted three stages/forms of magnesium oxide, you are only interested in the classification of the first two forms. The last form, which is the finished product, will be produce
The tariff classification of magnesium oxide from Canada
The laboratory confirmed the product to be caustic calcined magnesite.
The tariff classification of magnesium oxide from Japan
Starmag P and Starmag PG, which were referenced as the tradename for magnesium oxide, were sent to our Customs laboratory for analysis. The laboratory confirmed the product to be magnesium oxide.
Revocation of New York Ruling Letter (NYRL) 849858; Magnesium Oxide
In NYRL 849858, the merchandise was briefly described as magnesium oxide. ISSUE: The issue concerns the proper classification of magnesium oxide.
The tariff classification of magnesium oxide from Holland
The laboratory confirmed the product to be calcined magnesium oxide.
The tariff classification of frozen veal cutlets from New Zealand.
The product in question, frozen veal cutlets, be produced from veal round and loin cuts. This meat would be imported into Mexico where the leg and loin muscles will be trimmed of all fat and tissue and processed into two ounce portions. Aft
The tariff classification of magnesite ore from Greece and China.
The tariff classification of magnesite ore from Greece and China.
Other codes in heading 2519
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 2519.90.50.00 from each major US trading partner.
Follow 2519.90.50.00
Get an email when a new CBP ruling cites this code, a ruling on it is revoked, or its tariff measures change.
One email per day at most. Confirm your address once, unsubscribe anytime.
Need to defend this classification?
Get the full 10-digit classification with GRI reasoning for your product, backed by cited CBP rulings and an audit trail for reasonable care.