# Regulation (EC) No 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilisers (Text with EEA relevance), Division E.3.2: Complexing agents


The following complexing agents are only permitted in products for fertigation and/or foliar application, except for Zn lignosulfonate, Fe lignosulfonate, Cu lignosulfonate and Mn lignosulfonate that can be applied directly to the soil.
Acids, or sodium, potassium or ammonium salts of:
For information only.
For quality reasons, the relative phenolic hydroxyl content and the relative organic sulphur content as measured by EN 16109 must exceed 1,5 % and 4,5 % respectively.
No
Designation
Alternative designation
Chemical formula
CAS number of the acid
1
Lignosulfonic acid
LS
No chemical formula available
8062-15-5
2
Heptagluconic acid
HGA
C 7 H 14 O 8
23351-51-1

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Source: https://www.legislation.gov.uk/eur/2003/2003/division/E./division/E.3./division/E.3.2. (the official version)
Page: https://openlegislation.uk/eu-regulation-2003-2003/division-E./division-E.3./division-E.3.2.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.