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3911.90.35.00/Low-K Dielectric Cyanate Ester/Mexico

Low-K Dielectric Cyanate Ester from Mexico

Specialty hydrocarbon novolac cyanate ester with dielectric constant <2.8, per HTS 3911.90.35.00 specification. Used in high-frequency antenna applications. Maintains primary resin form for processing flexibility.

Duty Rate — Mexico → United States

10%

Rate breakdown

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

• Provide dielectric constant test data supporting performance claims

• Ensure formulation excludes conductive fillers

• Common misclassification as generic polysulfone 3911.90.55