2519

Analysis

Heading 2519 of the Harmonized Tariff Schedule covers 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. It divides into 2 six-digit subheadings and 4 eight-digit tariff lines, with 4 ten-digit statistical suffixes below them.

Every one of its 4 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.

The largest subheadings are 2519.90 (other, 3 lines) and 2519.10 (unnamed, 1 line).

By Census's concordance, most of its statistical lines are made by Ground or Treated Mineral and Earth Manufacturing (327992) and Sand, Gravel, Clay, and Ceramic and Refractory Minerals Mining and Quarrying (21232). Those are the NAICS industries a US producer of these goods would report under.

Its median rate of duty-free sits at the 46th percentile of the headings in chapter 25.