This sub-class includes: •wholesale of petrochemical primary products such as olefins, aromatics and/or basic building blocks and/or derivatives and/or intermediates produced from basic building blocks •wholesale of synthetic resins, plastic materials and/or non-vulcanisable elastomers in the form of moulding and extrusion compound, solid and/or liquid resins, sheets, rods, tubes, granules and/or powders Units in this sub-class are primarily engaged in: •wholesale of: - plastics in primary forms: polymers (including those of ethylene, propylene, styrene, vinyl chloride, vinyl acetate and/or acrylics), polyamides, phenolic and/or epoxide resins and/or polyurethanes, alkyd and/or polyester resins and/or polyethers, silicones, ion-exchangers based on polymers - cellulose and/or its chemical derivatives - synthetic rubber in primary forms; synthetic rubber, factice