German technology
Humic Substances Based Products
Humintech GmbH
Am Pösenberg 9-13
D-41517 Grevenbroich

Telefon: +49 2181 70 676 - 0
Fax: +49 2181 70 676 - 22
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HUMIRON® Fe Liquid Brochure

Number: EINECS - 271-030-1
Number: CAS - 68514-28-3

Reference number (REACH):

HUMIRON® Fe Liquid Safety Data Sheet


HUMIRON® Fe Liquid iron humate is an iron deficiency corrector, containing iron in the amount of 2%, chelated and complexed with humic acids. Therefore iron is provided in a form that is readily available to be taken up by plants in a wide variety of problematic soils (e.g. alkaline and calcareous soils, sandy soils with low organic matter content, etc.).
The product is designed to prevent and correct iron deficiency in all agricultural and horticultural crops. It can be applied either to the soil or as a foliar spray. The presence of humic acids in this formulation exerts a positive effect on plant growth as well as on resistance against biotic and abiotic stresses.


HUMIRON® Fe Liquid is obtained through extraction from German Leonardite (highly oxidized lignite) and addition of a mineral iron salt. Accordingly, the raw materials used for the formulation of HUMIRON® Fe Liquid are harmless and guarantee an environmentfriendly iron chelate.


Iron is needed to produce chlorophyll and to activate several enzymes, including enzymes involved in the oxidation /reduction processes of photosynthesis and respiration in plants. When crops suffer from Fe deficiency, the main symptom is chlorosis, evidenced by yellowing between the leaf veins of young leaves. The addition of Humiron Fe Liquid helps to counteract this disorder effectively. Stimulates plant growth.

  • Increases iron and nutrient uptake through the roots
  • Economic source of iron versus traditional chelated sources
  • Direct uptake of iron prior conversion unnecessary
  • Rich in humic and fulvic acids, which protect iron and existent micro nutrients from oxidation
  • Improves water retention capacity and reduces nutrient losses
  • Environment-friendly
  • Increases nutrient uptake
  • Acts as a natural chelator for microelements in alkaline and calcareous soils and increases their availability to plants
  • Decreases stress by drought and/or application of pesticides
  • Reduces the residues of herbicides and toxic substances in the soil
  • It is a natural product in contrast to synthetic chelates, which often contain excess sodium (e.g. some types of EDDHA)


In all crops
20-30 L/ha divided into several doses (3-4 L/ha) during the season

Vegetables in greenhouses 
25-35 L/ha divided into several doses (3-4 L/ha) during the season

Horticultural fruit trees
25-35 L/ha divided into several doses (3-4 L/ha) or 0.5-1 L/tree during the season 

Open field vegetables
20-25 L/ha divided into several doses (3-4 L/ha) during the season

Cereals, potatoes, legumes
20-30 L/ha divided into several doses (3-4 L/ha) during the season

Ornamental plants and tree nursery, turf grass, landscaping (in general)
25-35 L/ha divided into several doses (3-4 L/ha) during the season

Foliar application
0.5-1 L/1000 L water every 2-3 weeks during the season 

* This recommendation may be varied according to the soil characteristics and local conditions.

INHERENT COMPOSITION  (Typical values on basis Fresh Matter)

Potassium - Humates

14 - 16 %

Total Humic Acids 1/2 

12 - 14 %

Humic Acid 1

11 - 12 %

Fulvic Acid 1

1 - 2 %

Potassium (K2O)

3 - 4 %

Dry Matter

83 - 85 %

Organic Substance

14 - 15 %

pH - value

9.5 -  10.5

Iron (Fe - Chelate)

2 %


1.2 kg/L

1 according to ISO 19822 / HPTA / AAPFCO / IHSS Analysis method 
2 according to CDFA  11 - 12 % / Colorimetric method 14 - 15 %
“All Humintech humic substances based products are analysed according to the HPTA test method (ISO 19822:2018) to determine the content of humic and hydrophobic fulvic acids. Most suppliers are using the more simple “colorimetric” analysis method to determine the humic and fulvic acid contents, but experience shows that, due to its inaccuracy, this method indicates higher contents and is not suited to identify non humic substances such as lignosulphonates. In order to maintain the highest quality standard, Humintech has therefore decided to use the currently best analytical standard for the determination of humic and fulvic acids within the scope of quality control.”


Humintech is a biotech company based in Grevenbroich, Germany. We are primarily focused on the research, development and industrial production of humic matter and humic acids for the agricultural sector.  Our products find further use in the feed, pharmaceutical and construction industry, in veterinary medicine and for ecological purposes such as water purification and soil decontamination.


Humintech GmbH

Am Pösenberg 9-13
41517 Grevenbroich / Deutschland 

Phone: +49 2181 70 676 - 0
Fax: +49 2181 70 676 - 22