</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Diisodecyl Orthophthalate (DIDP) Plasticizer from Mexico

Diisodecyl orthophthalate (DIDP) is a branched-chain phthalate ester used primarily as a high-performance plasticizer for polyvinyl chloride (PVC) resins. It falls under HTS 2917.33.0010 as a specific didecyl orthophthalate derivative within aromatic polycarboxylic acid esters. This chemical compound enhances flexibility and durability in plastics without impurities that would alter its classification.

Duty Rate — Mexico → United States

16.5%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

Import Tips

Verify chemical purity via Certificate of Analysis (CoA) to confirm it meets Chapter 29 definition as a separate chemically defined compound without disqualifying impurities

Include Safety Data Sheet (SDS) and TSCA certification for EPA compliance, as phthalates face regulatory scrutiny under chemical import rules

Avoid misclassification as a mixture; ensure packaging labels it solely as DIDP to prevent reclassification under heading 3824 for chemical preparations