+**Cd2** is the divalent cadmium ion, a common dissolved form of the heavy [metal](/wiki/metal) cadmium. Its presence in [aquatic environments](/wiki/water) and biological systems is often linked to toxicity, impacting cellular functions.
+## See also
+- [Cadmium](/wiki/cadmium)
+- [Heavy Metal](/wiki/heavy-metal)
+- [Toxicity](/wiki/toxicity)
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