Alkali or alkaline-earth metals; rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed; mercury

Inorganic chemicals; organic and inorganic compounds of precious metals; of rare earth metals, of radio-active elements and of isotopes

28

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Alkali or alkali-earth metals; sodium

2805_11

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Alkali or alkali-earth metals; calcium

2805_12

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Alkali or alkali-earth metals; other than sodium and calcium

2805_19

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Earth-metals, rare; scandium and yttrium, whether or not intermixed or interalloyed

2805_30

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Mercury

2805_40

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