Harmonized System

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Section VI > Chapter 28 > Heading 2801

Explanatory notes

… Au 79 Precious metal (71.08). Hafnium........... Hf 72 Base metal (81.12). Helium............... He 2 Rare …

Section VI > Chapter 28 > Heading 2811

Explanatory notes

… (* ) : (A) COMPOUNDS OF FLUORINE (1) Hydrogen fluoride (HF). Obtained by the action of sulphuric acid on natural …