Explanatory notes
… sodium, potassium, strontium, antimony, nickel, titanium, zirconium, tin, lead, etc. This heading does not include … powder. (2) Metal nitrides . Aluminium, titanium, zirconium, hafnium, vanadium, tantalum or niobium nitrides … carbon dioxide in the air. It is sensitive to shock, like mercury fulminate, but less sensitive to heat than the …