High Purity Ammonium Heptamolybdate (AHM) – Essential Molybdenum Source for Catalysts & Advanced

Understanding Ammonium Heptamolybdate: Properties and Structural Characteristics

Ammonium Heptamolybdate (AHM), commonly supplied as the tetrahydrate form (NH₄)₆Mo₇O₂₄·4H₂O, is a white crystalline powder widely used as a high-purity molybdenum source in catalysts, pigments, electronic materials, and metal finishing processes. Its excellent solubility, purity, and stability make it one of the most important molybdenum salts in industrial and scientific applications.

Key Chemical and Physical Properties

Below is a quick reference of the essential specifications of Ammonium Heptamolybdate:

Thermal Behavior and Chemical Reactivity

When heated, Ammonium Heptamolybdate undergoes gradual decomposition, releasing ammonia and water while forming various molybdenum oxides such as MoO₃. This controlled decomposition behavior makes AHM an ideal precursor for producing high-purity MoO₃ and other molybdenum-based catalysts.

AHM contains the heptamolybdate anion [Mo₇O₂₄]⁶⁻, a highly stable polyoxometalate structure that is widely used in catalysis, corrosion inhibition, and advanced inorganic synthesis.

Major Applications of High-Purity Ammonium Heptamolybdate

Thanks to its stability, high molybdenum content, and clean decomposition pathway, Ammonium Heptamolybdate plays a critical role in several high-performance industries.

1. Advanced Catalysts for Petrochemical & Clean Energy Processes

In the petrochemical and clean-energy sectors, high-purity Ammonium Heptamolybdate (AHM)serves as a cornerstone raw material for producing advanced molybdenum-based catalysts. These catalysts are essential in refinery upgrading processes such as hydrodesulfurization (HDS) and hydrodenitrogenation (HDN), where removing sulfur and nitrogen impurities is critical for meeting global clean-fuel standards.

Catalysts derived from AHM exhibit exceptional thermal stability, high catalytic activity, and strong resistance to sulfur poisoning—qualities that directly contribute to improved fuel quality and reduced environmental emissions. AHM’s reliable performance in selective oxidation and reduction reactions further strengthens its role in modern catalytic systems used in industrial chemical transformations.

2. High-Purity Precursor for Molybdenum Oxides and Metal Powder Production

Ammonium Heptamolybdate is widely recognized as one of the most efficient and reliable precursors for producing molybdenum-based materials, including MoO₃, MoO₂, and high-purity molybdenum metal powders. Through controlled thermal decomposition, AHM produces uniform oxide intermediates with excellent purity and defined crystal structure—key properties required in industries such as superalloy manufacturing, electronics, specialized coatings, and high-temperature structural materials.

With its predictable decomposition pathway and consistent material output, AHM continues to be a preferred choice for companies seeking reliable and scalable molybdenum sources for high-performance industrial applications.

3. Colorants for Ceramic, Glass, and High-Temperature Pigment Applications

In the ceramics and glass industries, AHM is valued for its ability to generate bright, stable molybdenum-based pigments. These high-temperature-resistant colorants retain their chromatic intensity and uniformity even under extreme firing conditions, making them ideal for producing molybdenum orange pigments, fully vitrified glazes, and specialty glass color formulations.

The excellent heat stability and color consistency provided by AHM-derived pigments ensure aesthetic quality and durability—qualities demanded by architectural ceramics, household glassware, and high-end artistic applications.

4. Electronics, Metal Finishing & Thin-Film Applications

Ammonium Heptamolybdate is a critical molybdenum source in several electronic and surface-engineering technologies. It is used in electroplating formulations to enhance metal coating performance, improve corrosion resistance, and achieve specific surface characteristics. Additionally, AHM plays an important role in thin-film deposition processes and is used to formulate materials for semiconductor and optical applications.

Its high purity ensures consistent electrical and physical behavior—an essential requirement in advanced electronic manufacturing.

FAIRSKY Quality, Storage, and Supply Information

As an experienced producer of molybdenum, FAIRSKY ensures strict quality control and consistent production standards to supply high-purity AHM to customers worldwide.

l  Storage:Store in a cool, dry, and well-ventilated place. Keep containers tightly sealed to prevent moisture absorption and contamination.

l  Packing:Standard packaging: 25 kg bags.(Customized packaging is available upon request.)