Calcium Tungstate Powder from China
Calcium tungstate (CaWO4) powder is a scintillator material used in medical imaging detectors, classified under HTS 2841.80.00 as an alkaline earth tungstate. Its high density makes it ideal for radiation detection.
Duty Rate — China → United States
30.5%
Rate breakdown
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Certify radiation-free status with Geiger counter logs to avoid 2844 radioactive materials scrutiny
• Specify particle size distribution (e.g
• <10 micron) as it affects classification uniformity
• For doped variants, declare dopant levels (<0.1%) to remain under pure tungstate heading