Special provision 584

This gas is not subject to the requirements of ADR when: -It contains not more than 0.5 % air in the gaseous state; -It is contained in metal capsules (sodors, sparklets) free from defects which may impair their strength; -The leakproofness of the closure of the capsule is ensured; -A capsule contains not more than 25 g of this gas; -A capsule contains not more than 0.75 g of this gas per cm³ of capacity.