NOVELTY - The hydrogen storage packaged reactive material (10) comprises a reactive material (12) that is configured to increase in size, when exposed to a predetermined gas, an inert coating material (14, 16) surrounding a surface of the reactive material, and an additional inert coating material deposited on the inert coating material. The inert coating material: is configured to allow the predetermined gas to diffuse through to the reactive material; and has an elongation that does not accommodate expansion of the reactive material at full saturation of the predetermined gas.    USE - Used as hydrogen storage packaged reactive material.    ADVANTAGE - The hydrogen storage packaged reactive material can be easily manufactured with high purity, and can be protected from air, moisture, and/or other external environmental factors during shipping and pre-use handling.    DETAILED DESCRIPTION - The hydrogen storage packaged reactive material (10) comprises a reactive material (12) that is configured to increase in size, when exposed to a predetermined gas, an inert coating material (14, 16) surrounding a surface of the reactive material, and an additional inert coating material deposited on the inert coating material. The inert coating material: is configured to allow the predetermined gas to diffuse through to the reactive material; has an elongation that does not accommodate expansion of the reactive material at full saturation of the predetermined gas; is impermeable to the air, solvents and/or water vapor; is doped with a heat transfer enhancer of an expanded natural graphite, conductive polymers and/or conductive nanostructures; is doped with an additive of a friction reducer and/or a wear resistor; and has a thickness of 1 mu m to 1 mm. The reactive material is: reactive to air, solvents and/or water vapor; a solid mass having an initial diameter of 1 mm to 10 cm; and metal organic frameworks, covalent organic frameworks, polymers of intrinsic micro-porosity, material of a Lavoisier institute, mine gas absorbents, clays, graphitic structures and other carbon structures. The additional inert coating material is formed of a polymer other than a polymer used in the inert coating material. An INDEPENDENT CLAIM is included for a method for packaging a reactive material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of a hydrogen storage packaged reactive material.    Hydrogen storage packaged reactive material (10)    Reactive material (12)    Inert coating materials. (14, 16)