Helium-3/Helium-4 Hyperpure Mixture
Hyperpure helium mixture with He-3 isotopically enriched to >99% of helium content, meeting HTS 2804.29.0030 for isotopically pure rare gases. Used in dilution refrigerators for ultra-low temperature physics.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If below 99% isotopic purity
Lower purity helium isotopes classify as other rare gases.
If pre-charged in cryostats
Machinery containing the gas as working fluid uses 8419 classification.
If complex with phosphides
Other nonmetal compounds including phosphides fall under 2853.
Not sure which classification is right?
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Import Tips & Compliance
• Specify He-3 fraction relative to total helium content in certificate of analysis
• Use cryogenic transport containers; declare low-temperature hazard class
• Differentiate from LNG helium mixtures which use different energy headings
Related Products under HTS 2804.29.00.30
Isotopically Pure Helium-3 Gas
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