To preserve the concentration accuracy and shelf life of Sulphuric Acid N/50, it should be stored in a tightly sealed, borosilicate glass or HDPE container in a cool, dry, and well-ventilated area away from direct sunlight, heat, and moisture. Exposure to air should be minimized as atmospheric moisture and carbon dioxide can gradually alter the solution's concentration over time. Always ensure the container is properly resealed immediately after each use to maintain its standardized normality and analytical reliability.