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HTS 2519Natural 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

Product or HTS code

Rate lines4

Code	Description	General	Special	Column 2	Units	Calculate
2519.10.00.00	2519.10.00.00Natural magnesium carbonate (magnesite)General Free · Column 2 $10.33/t · t	Free		$10.33/t	t
2519.90	2519.90Other
2519.90.10.00	2519.90.10.00Fused magnesia and dead-burned (sintered) magnesiaGeneral Free · Column 2 1.7¢/kg · kg	Free		1.7¢/kg	kg
2519.90.20.00	2519.90.20.00Caustic calcined magnesiteGeneral Free · Column 2 $20.70/t · t	Free		$20.70/t	t
2519.90.50.00	2519.90.50.00OtherGeneral Free · Column 2 15.4¢/kg · kg	Free		15.4¢/kg	kg

2026 HTS Revision 21 (October 9, 2026)

Duty by country of origin

Rate line	China52.52% of imports	Canada11.24% of imports	Brazil9.69% of imports	Israel7.79% of imports	Mexico5.51% of imports	Japan4.7% of imports	Spain2% of imports	Türkiye1.84% of imports	Italy0.94% of imports	India0.73% of imports
2519.10.00.00Natural magnesium carbonate (magnesite)	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
2519.90.10.00Fused magnesia and dead-burned (sintered) magnesia	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
2519.90.20.00Caustic calcined magnesite	0%	0%	0%	0%	0%	0%	0%	0%	0%	0%
2519.90.50.00Other	12.5%9903.05.31	10%9903.05.29	37.5%9903.05.019903.05.27	12.5%9903.05.47	10%9903.05.55	12.5%9903.05.49	10%9903.05.39	12.5%9903.05.79	10%9903.05.39	10%9903.05.44

Total duty on a $10,000 ocean shipment entered 2026-10-13, before customs fees. Origins are the leading sources of US imports under this heading in 2025 (US Census Bureau).