# Alternatives to EDTA for calcium ion chelation

Are there any $\ce{Ca^2+}$ chelating agents (other than EDTA) that are as good as EDTA in terms of binding calcium ions and effective in a pH range of $5$ to $9$?

• Hi Smruthi, welcome to Chem.SE! Have you done research on this topic? If so, please share your research on this topic! It will help potential answerers on the extent of your knowledge. – JavaScriptCoder Feb 20 '18 at 16:01
• I don't have time to write an answer now, but this looks interesting, since crown ethers are known for their ion selectivity: dx.doi.org/10.1021/ac00098a016 – pentavalentcarbon Feb 20 '18 at 19:43
• – Curt F. Feb 20 '18 at 21:04