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2903.43.10.00/HFC-152a Medical Aerosol Propellant/Japan

HFC-152a Medical Aerosol Propellant from Japan

Pharmaceutical-grade HFC-152a is employed as a propellant in metered-dose inhalers for asthma medications. Under HTS 2903.43.10.00, it is classified as the pure 1,1-difluoroethane compound, meeting chapter requirements for chemically defined organic substances. Its GMP production ensures safety for respiratory delivery.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• FDA Drug Master File and USP compliance mandatory; use pharma-specific packaging

• Pitfall: Non-GMP grade can trigger FDA import alerts