Commission Regulation (EU) 2020/1666 of 10 November 2020 amending Regulation (EC) No 2003/2003 of the European Parliament and of the Council relating to fertilisers for the purpose of including a new type of EC fertiliser in Annex I (Text with EEA relevance)
"2.3 | calcium chelate of iminodisuccinic acid | Chemically obtained product containing calcium chelate of iminodisuccinic acid as essential ingredient, without addition of organic nutrients of animal or vegetable origin | Calcium expressed as CaO, chelated by iminodisuccinic acid (IDHA) water-soluble" |