Radon Gas Calibration Standard from Canada
Trace radon-222 gas in sealed diffusion chambers for environmental radiation monitoring equipment calibration. Classified under HTS 2804.29.00 as radon represents 'other' rare gases, despite short half-life and radioactive properties below 2844 thresholds. Used strictly for calibration purposes.
Duty Rate — Canada → United States
3.7%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include decay chain analysis and activity concentration certificates; ship as excepted quantity under DOT 49 CFR; never declare as waste which triggers hazardous waste rules