Harmonized System

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Section VI > Chapter 28 > Heading 2829

Chlorates and perchlorates; bromates and perbromates; iodates and periodates.

Section VI > Chapter 28 > Heading 2829 > 2829.1

Chlorates 

Section VI > Chapter 28 > Heading 2830

Sulphides; polysulphides, whether or not chemically defined.

Section VI > Chapter 28 > Heading 2830 > 2830.10

Sodium sulphides

Section VI > Chapter 28 > Heading 2831

Dithionites and sulphoxylates.