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➤ They are used for carcinoma removal, precision tissue cutting, treatment of vascular diseases, ophthalmic surgery, and other medical procedures.

➤ They have high water absorption, which is effective for tissue cutting and coagulation.

➤ Used in MRI studies.

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➤ Severe intoxication can lead to nephropathy and CNS disorders, allergic reactions to the skin, eyes and respiratory tract, and adversely affect kidney and liver function.

➤ There is no specific antidote.

➤ It is one of the heaviest lanthanides, with a density of more than 9 g/cm³.

➤ Glass with erbium absorbs infrared rays.