Registration Dossier
Registration Dossier
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EC number: 264-731-9 | CAS number: 64216-15-5
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
Simmons (2012) investigated the effects of calcium in form of CaCl2 on duckweed Lemna minor during a 7-days static exposure. The respective EC10 and EC50 values of 272.5 and 1162.3 mg Ca/L (nominal) for frond numbers are above the OECD test limit. In European stream water, the median background concentration of calcium amounts to 40 mg Ca/L (Salminen et al. 2005). Since calcium is an essential macronutrient for aquatic plants, all media used for toxicity testing (such as Modified Swedish Standard (SIS) and 20X AAP (U.S. EPA)) require the addition of calcium ranging from 10 to 25 mg Ca/L.
In sum, calcium as an essential element has a very low potential for toxicity to aquatic freshwater plants.
Key value for chemical safety assessment
Additional information
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