Lohtragon® C08 | Type 3

Q: What are Iron Citrates?

Iron Citrates are inorganic salts of citric acid and iron. Ferrous Citrates contain Fe²⁺ cations and typically appear as light green crystalline solids or powders, while Ferric Citrates contain Fe³⁺ cations and are reddish-brown. Both are sparingly to slightly soluble in water and are used for controlled iron delivery and complexing in technical applications.

Q: What are Iron Citrates used for and why?

Catalysts: Ferric Citrates serve as stable iron precursors with controlled release and thermal stability Crop care: Ferric Citrates supply soluble iron for plant nutrition, especially in liquid fertilizers and aquatic systems Water treatment: Ferrous and Ferric Citrates bind sulfides and precipitate heavy metals, helping with odor and corrosion control Ceramics & glass: Ferric Citrates act as pigment precursors for stable and vivid iron-based ceramic inks

Q: Where are our Iron Citrates produced?

They are produced at our manufacturing facilities in Germany.

Q: What is special about our Iron Citrates?

Over 135 years of expertise in mineral and specialty salts Exclusive production in Germany with strict quality control Consistent solubility and high-purity materials Full batch traceability and transparent supply chain Compliance with EU REACH and food-contact regulations where applicable

Q: What is the difference between Ferrous Citrates and Ferric Citrates?

Ferrous Citrates (Fe²⁺): green, provide gentler iron release, suitable for nutrient systems and processes requiring controlled solubility Ferric Citrates (Fe³⁺): reddish-brown, more stable, ideal for catalytic, pigment, or high-pH applications

Q: What is the difference between liquid and solid Iron Citrates?

Solid forms such as powders or granules are easier to store, transport with lower weight, and allow flexible preparation of solutions in different concentrations. Solutions, on the other hand, are ready-to-use, enable precise dosing, reduce dust exposure, and can be much more practical in continuous or large-scale processes depending on the customer’s requirements.

Ferric Sodium Citrate Solution

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Lohtragon® C08 | Type 3

Product Data

Lohtragon^® C08 aqueous solution based on Ferric Sodium Citrate / Iron(III) Sodium Citrate (CAS No. 52031-09-1) is an iron-based complex ideal for demanding industrial and technical applications. Its strong chelating and acid-scavenging properties make it particularly effective in systems requiring hydrogen sulfide (H₂S) control, corrosion prevention, and metal ion stabilization.
This high-performance solution is suitable for use in biogas treatment, wastewater management, nutrient fortification, and catalyst preparation, offering excellent reactivity, handling ease, and formulation flexibility.

Rely on Lohtragon^® quality for consistent performance and proven reliability. With production sites in Germany, we are your trusted Ferric Sodium Citrate manufacturer.

General Characteristics

Synonyms: Iron(III) Sodium Citrate Solution

Formula	C₆H₈O_7.xFe_.xNa
CAS No.:	52031-09-1
EINECS No.:	257-620-1
HS No.:	29181500

Product parameter	Additional information	Storage conditions \| Retest period
liquid approx. 18 % Fe \| dark brown \|	Our Ferric Sodium Citrate Solution, approx. 55 %	Keep well closed and at room temperature, must be kept at temperatures above 0 °C; 24 months

++ > 100 g/l | + 10 - 100 g/l | − 1 - 10 g/l | −− < 1 g/l
The solubility specified here was measured in water. The solubility is influenced by many factors in the application.

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Ferric Sodium Citrate for Biogas Production

The aqueous solution Lohtragon^® C08 based on Ferric Sodium Citrate demonstrates superior efficacy in quickly reacting with and neutralizing H₂S compared to solid alternatives. In addition to its targeted action against hydrogen sulfide, Lohtragon^® C08 also functions as an effective acid scavenger, helping to stabilize the system by neutralizing acidic byproducts. This results in reduced odor complaints and mitigated corrosion within the facility. Additionally, the ease of dosage control and handling made the process more manageable and efficient, establishing the solution as a preferable choice for H₂S elimination.

Key benefits of Iron(III) Sodium Citrate, Solution in Biogas Production:

Effective H₂S neutralization: Rapid and reliable reaction with hydrogen sulfide reduces odors and improves air quality
System stabilization and corrosion protection: Dual function as an acid scavenger helps neutralize acidic byproducts, reducing corrosion and extending equipment lifespan.
Easy handling and dosing: Liquid form allows for simple, precise application, improving operational efficiency and process control.

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Unlock the full potential of your process with Lohtragon^®C08 based on Ferric Sodium Citrate, Solution / Iron(III) Sodium Citrate (CAS No. 52031-09-1). Ready to elevate your formulation?
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Other application areas:

Wastewater Treatment
Binds sulfide compounds and helps precipitate heavy metals such as phosphate or arsenic; contributes to odor control and reduced corrosion in piping systems
Animal Nutrition
Acts as a bioavailable iron source in mineral feed premixes (especially in aquatic and poultry nutrition), supporting healthy growth and anemia prevention
Catalyst Manufacturing
Serves as an iron source in the production of iron-based heterogeneous catalysts (similar to ferric citrate) with controlled release and solubility
Pharmaceutical & Nutraceutical (non-food, industrial grade)
Used in the formulation of non-ingestible products like topical wound care or sanitizers requiring iron complexation and mild acidity buffering
Agricultural Foliar Sprays
Provides diluted iron for foliar nutrient delivery in iron-deficient crops, especially in alkaline soils where iron chelates are needed

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Our detailed product and production knowledge allows us to adapt the chemical and physical properties of our metal salts in line with their intended purpose, depending on where and how they are to be used, and to develop individual processes and solutions in collaboration with our customers. Get an idea about our extensive R&D capabilities and benefit from new developments and custom specifications.

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Frequently asked questions about this product

What are Iron Citrates?

Iron Citrates are inorganic salts of citric acid and iron. Ferrous Citrates contain Fe²⁺ cations and typically appear as light green crystalline solids or powders, while Ferric Citrates contain Fe³⁺ cations and are reddish-brown. Both are sparingly to slightly soluble in water and are used for controlled iron delivery and complexing in technical applications.

What are Iron Citrates used for and why?

Catalysts: Ferric Citrates serve as stable iron precursors with controlled release and thermal stability
Crop care: Ferric Citrates supply soluble iron for plant nutrition, especially in liquid fertilizers and aquatic systems
Water treatment: Ferrous and Ferric Citrates bind sulfides and precipitate heavy metals, helping with odor and corrosion control
Ceramics & glass: Ferric Citrates act as pigment precursors for stable and vivid iron-based ceramic inks

Where are our Iron Citrates produced?

They are produced at our manufacturing facilities in Germany.

What is special about our Iron Citrates?

Over 135 years of expertise in mineral and specialty salts
Exclusive production in Germany with strict quality control
Consistent solubility and high-purity materials
Full batch traceability and transparent supply chain
Compliance with EU REACH and food-contact regulations where applicable

What is the difference between Ferrous Citrates and Ferric Citrates?

Ferrous Citrates (Fe²⁺): green, provide gentler iron release, suitable for nutrient systems and processes requiring controlled solubility
Ferric Citrates (Fe³⁺): reddish-brown, more stable, ideal for catalytic, pigment, or high-pH applications

What is the difference between liquid and solid Iron Citrates?

Solid forms such as powders or granules are easier to store, transport with lower weight, and allow flexible preparation of solutions in different concentrations. Solutions, on the other hand, are ready-to-use, enable precise dosing, reduce dust exposure, and can be much more practical in continuous or large-scale processes depending on the customer’s requirements.

The information given on this Website corresponds to our current knowledge. We warrant in the frame of our General Terms and Conditions of Sale that our products are manufactured in accordance with the specifications. However, we disclaim any liability with regard to the suitability of our products for a particular purpose or application or their compatibility with other substances. Tests have to be performed by the customer who also bears the risk in this respect. Nothing herein shall be construed as a recommendation to use our products in conflict with third parties' rights.

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