| Subject | English | Spanish |
| chem. | complexing agent | agente complejante |
| environ. | complexing agent A substance capable of forming a complex compound with another material in solution | agente de complexión |
| chem. | complexing agent | agente secuestrante |
| chem. | complexing power | poder complejante |
| chem. | organic complexing agent | agente orgánico de complejación |