NELFEROX® Series Iron Oxide & Fertilizer Coloring - NOELSON CHEMICALS

In modern fertilizer manufacturing, coloring is not purely aesthetic; it also supports product identification, brand differentiation, and application safety. Among all available pigment options, Iron Oxide Red stands out as one of the most technically reliable and industrially proven solutions for fertilizer coloration.

1. Exceptional Chemical & Thermal Stability

Iron Oxide Red (α-Fe₂O₃) is a thermodynamically stable inorganic oxide. This stability is critical in fertilizer systems, which may involve:

• Acidic or alkaline environments

• Elevated temperatures during drying or granulation

• Prolonged storage under humidity and UV exposure

Unlike many organic pigments, Iron Oxide Red:

• Does not decompose, fade, or discolor under UV light

• Remains stable in contact with urea, ammonium salts, phosphates, and potash

• Tolerates thermal processing typically used in fertilizer granulation (spray, drum, extrusion)

This ensures long-term color retention throughout the fertilizer’s lifecycle: from production to field application.

2. No Interference with Nutrient Release

Iron Oxide Red is chemically inert in fertilizer matrices:

• It does not participate in ion exchange

• It does not chelate or bind nutrients

• It does not affect dissolution or controlled-release behaviour

As a result, fertilizer performance: nutrient availability, release rate, and agronomic efficiency, remains unchanged.

3. High Safety Profile & Environmental Compatibility

As an inorganic pigment, Iron Oxide Red is:

• Non-toxic

• Odorless

• Insoluble in water

• Environmentally benign

With advanced production control, NELFEROX® Series Iron Oxide features:

• Extremely low heavy metal content

• Minimal soluble salts

• Low impurity levels

It is particularly suitable for fertilizers intended for agricultural, horticultural, and turf applications.

4. Superior Dispersibility in Granulation Processes

Color uniformity is a key technical requirement in fertilizer coloring. Iron Oxide Red with optimized particle size distribution disperses efficiently during:

• Extrusion granulation

• Drum granulation

• Spray-on slurry coloring

This results in:

• Uniform color distribution

• Minimal speckling or color streaks

• Consistent appearance across fertilizer batches

Potash Fertilizer Colored by Iron Oxide Red