1 Chemicals for use in the manufacture of water treatment; chemicals used in the treatment, operation and maintenance of boilers, metal tanks, and heating apparatus and installations, cooling and refrigeration apparatus and installations, water supply apparatus, thermal condensers and other installations comprising pipes and tubes; water treatment chemicals, namely, mineral and organic coagulants and flocculants, scale corrosion inhibitors, anti-foams, disperants, oxygen scavengers; scale inhibiting chemicals and anti-fouling chemicals for use in the treatment of liquids via membrane, such as ultrafiltration, nanofiltration, and hyperfiltration or reverse osmosis; machining fluids for use in metalwork; rust inhibitors