Chemicals used in industry, science and photography, as well as in agriculture, horticulture and forestry; unprocessed artificial resins, unprocessed plastics; manures; fire extinguishing compositions; tempering and soldering preparations; chemical substances for preserving foodstuffs; tanning substances; adhesives used in industry; chemicals used in industry for aerating, protecting, preserving, bleaching, brightening, staining and sealing metallic and non-metallic surfaces; antimicrobial agents used in treating and protecting concrete, natural stone, brick, slate and other masonry; chemical products used to cure and seal concrete, natural stone, brick, slate and other masonry; chemical products used to eliminate mould, mildew, algae and other surface grown parasites in concrete, natural stone, brick, slate and other masonry; non-hazardous chemical agents used on cementitious material including concrete and grout which acts as a suppressant to the growth of mould, mildew and fungi