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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

The 48 hour LC50 value of calcium iodate in invertebrate (Daphnia magna) was estimated to be 236.1352 mg/L. This value indicates that the chemical will not exhibit short term toxicity to invertebrates. As per the CLP criteria,the substance will not be classifed for Aquatic toxicity.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
236.135 mg/L

Additional information

Based on the various studies available with Klimish rating 2 for the read across substances for CAS NO 7789-80-2 and based on the category approach of organic functional group along with similar mechanistic approach and having structural similarities defined by QSAR toolbox. The results is summarized as follows




Effect values

Basis for effects






236.1352 mg/l


48 hrs

Daphnia magna

Predicted data for target chemical



226 mg/L.



24 hrs

Dreissena polymorpha

Data from publication for CAS no 7681-11-0


By applying weight of evidence approach to the studies summarized in the above table it can be observed that LC50 value is expected to be in range of 226 to 236.1352 mg/l in a 24 to 48 hrs study on the basis of mortality effect . Thus according to CLP criteria of aquatic classification it is concluded that the substance calcium iodate is not toxic to aquatic invertebrate (Daphnia magna and Dreissena polymorpha)