HSN Code 2850 refers to "Hydrides, nitrides, azides, silicides and borides, whether or not chemically defined (excluding compounds which are also carbides of heading 2849, and inorganic or organic compounds of mercury whether or not chemically defined)." This classification code is essential for identifying chemical compounds for import/export purposes based on their nature and intended use. Common products under HSN Code 2850 include lithium hydride, aluminum nitride, sodium azide, silicon boride, and titanium boride. Additionally, the GST rate for these chemical compounds under this code supports accurate trade compliance.