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SITCSection 6
U.S. imports of worked mica and articles of mica (SITC 66335) totaled $3.6M in July 2026, traded with 24 countries.
Importers of Worked Mica and Articles of Mica paid $608K in duties in July 2026 — an effective duty rate of 17% on $3.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Worked Mica and Articles of Mica imports of $3.6M in July 2026 ran 11% above the year-to-date monthly average of $3.3M.
Last updated: July 2026 dataWorked mica and mica-based articles — including sheet mica, mica paper, mica tape, and agglomerated mica products — are critical dielectric and thermal insulation materials in electrical equipment, electronics, and high-temperature industrial applications. Muscovite and phlogopite are the two commercially dominant mica species; phlogopite is preferred where higher temperature resistance is required. India has historically been a leading global supplier of block and sheet mica, while agglomerated mica products are manufactured in multiple countries from mica scrap and splittings.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
229 shipments/mo
Basic heading 448 of 766 in section 6
Basic heading 66335 · $3.6M of $26.7B
Natural block mica is split from mined crystals into thin sheets and used where the highest dielectric purity is required, such as in precision capacitors. Agglomerated (reconstituted) mica is manufactured by bonding mica splittings or paper with a binder, producing a uniform sheet product suitable for large-scale electrical insulation applications. Both forms fall within 66335, but they differ significantly in price, availability, and performance specifications.
Yes. Mica mining in certain producing regions has been associated with child labor and informal mining practices, prompting electronics and automotive manufacturers to implement supply-chain traceability programs. Importers sourcing raw or worked mica should be prepared to provide origin documentation and supplier audit records to satisfy corporate social responsibility requirements and customer due-diligence requests.
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Imports · July 2026
origin
China and Austria together supply 47% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$3.6MYoY · Pro
Exports
$2.3MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.