Standard International Trade Classification
U.S. exports of Polypropylene, Primary Forms (SITC 57511) totaled $188.8M in August 2026.
Importers of Polypropylene, Primary Forms paid $2.2M in duties in August 2026, an average duty rate of 5.05% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataPolypropylene (PP) in primary forms — pellets, granules, or powder — is one of the world's most widely traded commodity thermoplastics, serving as a feedstock for packaging, automotive components, nonwoven fabrics, and consumer goods. Trade flows are heavily influenced by global propylene feedstock costs and regional cracker capacity, with significant volumes moving from the Middle East and Asia into US markets. Certain polypropylene imports have been subject to Section 301 tariff measures depending on origin, and antidumping investigations have periodically targeted specific grades, making origin and grade documentation critical for cost modeling. Melt flow rate (MFR) and homopolymer vs. copolymer designation are the primary specification variables that determine end-use suitability and can affect classification at the 10-digit level.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.1K import shipments a month
Melt flow rate (MFR) is a key commercial specification — low-MFR grades suit pipe and sheet extrusion while high-MFR grades are used in injection molding and fiber spinning — but it does not by itself change the SITC or HTS heading. However, MFR documentation is routinely requested by buyers and may be relevant to scope determinations in antidumping proceedings that define covered merchandise by grade or application.
Importers should verify whether active antidumping or countervailing duty orders cover the specific grade and country of origin being sourced, as orders can be product-specific. Additionally, polypropylene from certain origins may carry Section 301 tariff exposure. A binding scope ruling request to CBP is advisable when the product specification is near the boundary of an order's scope.
Basic heading 20 of 465 in section 5
Basic heading 57511 · $188.8M of $26.2B
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Exports · August 2026
destination
Mexico and Canada together take 66% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$44.5MYoY · free account
Exports
$188.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $489.2M of Polypropylene, Primary Forms and exported $1.9B.
Through August 2026. Source: U.S. Census Bureau.