U.S. exports of Methacrylic Acid and Its Salts and Esters (SITC 51373) totaled $30.1M in August 2026.
Importers of Methacrylic Acid and Its Salts and Esters paid $1.4M in duties in August 2026, an average duty rate of 13.22% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Methacrylic Acid and Its Salts and Esters imports of $10.7M in August 2026 ran 17% below the year-to-date monthly average of $12.9M.
Last updated: August 2026 dataMethyl methacrylate (MMA) — the dominant ester in this group — is the monomer feedstock for polymethyl methacrylate (PMMA), sold commercially as acrylic glass or Plexiglas, and is also a key input for acrylic coatings and adhesives. Methacrylic acid itself is used as a co-monomer in specialty polymers for automotive, construction, and electronics applications. Trade in MMA has been shaped by antidumping proceedings in multiple jurisdictions, and importers sourcing from certain Asian suppliers should verify the current status of any applicable trade remedy orders. Proper hazardous-materials classification under DOT regulations is required for shipments of these reactive monomers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
234 import shipments a month
MMA is a reactive monomer that can polymerize spontaneously if inhibitor levels (typically hydroquinone monomethyl ether, MEHQ) fall below specification during transit. Importers should require certificates of analysis confirming inhibitor content and ensure cold-chain or temperature-controlled logistics are in place, particularly for long ocean voyages.
Both the acid, its metal salts (e.g., sodium methacrylate), and its esters (e.g., methyl, ethyl, butyl methacrylate) fall within this SITC heading. However, at the HTS 10-digit level, each form may carry a distinct tariff line, so importers should work with a licensed customs broker to confirm the correct subheading for their specific compound.
Basic heading 144 of 465 in section 5
Basic heading 51373 · $30.1M of $26.2B
Trade Directory
List your company and tag the 6-digit products you trade, so the companies trading them can find you. Be the first supplier listed.
Exports · August 2026
destination
Belgium and Mexico together take 60% 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
$10.7MYoY · free account
Exports
$30.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $158.7M of Methacrylic Acid and Its Salts and Esters and exported $299.0M.
Through August 2026. Source: U.S. Census Bureau.