BELCLENE 627 Belclene® & Belsperse® scale control Belclene 627, Tetra phosphonate, Scale & metal ion control, Excellent calcium sulfate inhibitor ; Belclene 630, Penta phosphonate, Scale & metal ion control. Belclene 627 The maleic, phosphinocarboxylic and phosphonocarboxylic acid technology on which Belclene 627