Harmonized System

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Section XVIII > Chapter 90 > Heading 9023

Explanatory notes

… Magdeburg hemispheres (for demonstrating the effects of atmospheric pressure), the’s Gravesande ring (for …

Section VI > Chapter 32 > Heading 3203

Explanatory notes

… saffron, etc. The heading also includes orchil and litmus, prepared from certain lichens; oenin from the skins …

Section VI > Chapter 33 > Heading 3302

Explanatory notes

… oil (obtained by freezing peppermint oil, followed by treatment with boric acid, to remove most of the menthol and …

Section XIII > Chapter 70 > Heading 7006

Explanatory notes

… processes (sand-blasted glass, or glass rendered dull by treatment with emery or acid); frosted glass; glass engraved …

Section XIII > Chapter 70 > Heading 7007

Explanatory notes

… been substantially increased by a complex physical-chemical treatment (e.g., ion-exchange) which may include a …

Section VI > Chapter 28 > Heading 2813

Explanatory notes

… natural sulphides, or from arsenic or arsenous oxide by treatment with sulphur or hydrogen sulphide. (a)  Diarsenic …