S-2.1, r. 13 - Regulation respecting occupational health and safety
87. Storage: Combustive substances shall be stored away from substances with which they may react and especially from the following substances:
(1) a corrosive substance with which they may react by exploding;
(2) an inflammable or combustible substance with which they may react violently;
(3) a toxic substance;
(4) a reducing agent, especially a metallic powder;
(5) a substance which oxidizes easily, including wood surfaces.