| Subject | English | German |
| chem. | auxiliary complexing agent | Hilfskomplexbildner |
| chem. | complexing agent | Komplexiermittel |
| chem. | complexing agent | Chelatbildner |
| chem. | complexing agent | komplexierende Verbindung |
| environ. | complexing agent A substance capable of forming a complex compound with another material in solution | Komplexbildner |
| chem. | complexing agent | Abscheidemittel |
| tech. | complexing agent | Komplexbildner |
| chem. | organic complexing agent | organischer Komplexbildner |
| energ.ind., chem. | organic complexing agent | organischer Komplexbilder |
| chem. | selective complexing agent | selektiver Komplexbildner |