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The pertechnetate ion is TcO4.

A pertechnetate is a compound containing this ion.

See category for a list.

Pertechnetates are salts of pertechnetic acid.

Pertechnetate is analogous to permanganate but it has little oxidizing power.

Solutions of pertechnetate react with the surface of iron to form technetium dioxide, in this way it is able to act as an anodic corrosion inhibitor. Powdered iron is one method of removing it from water.

Pertechnetate can substitute for iodine in the Na/I Symporter (NIS) Channel in follicular cells of the thyroid gland, inhibiting uptake of iodine into the follicular cells. Tc99m-pertechnetate is used for nuclear medicine imaging of the thyroid gland.