
1) Salt used in detergents
Found on
https://www.crosswordclues.com/clue/etidronate

A drug that belongs to the family of drugs called bisphosphonates. Bisphosphonates are used as treatment for hypercalcemia (abnormally high levels of calcium in the blood) and for cancer that has spread to the bone (bone metastases).
Found on
http://www.cancer.gov/dictionary?expand=E

(e-tĭ-dro´nāt) a bone calcium regulator used as the disodium salt in the treatment of symptomatic osteitis deformans, for the prevention of heterotopic ossification due to spinal cord injury or following total hip replacement, and for the treatment of hypercalcemia associated with malignancy. It is also used in bone...
Found on
http://www.encyclo.co.uk/local/21001
No exact match found.