Ammonium heptamolybdate

Ammonium heptamolybdate

Ammonium molybdate tetrahydrate; Heptamolybdic acid, ammonium salt; Diammonium heptamolybdate; Ammonium paramolybdate

CAS 12027-67-7

Chemical Formula (NH₄)₆Mo₇O₂₄•4H₂O

Molecular Weight 1235.86 g/mol (tetrahydrate form)

Ammonium heptamolybdate is a water-soluble compound used in catalysts, corrosion inhibitors, ceramics, and analytical chemistry. It also plays a key role in fertilizer formulations and the production of molybdenum-containing pigments and specialty chemicals.

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Industrial Uses

1. Agrochemicals

  • Micronutrient Fertilizer Component: AHM is widely used in foliar sprays and soil conditioners as a source of molybdenum, an essential nutrient for nitrogen metabolism and enzyme systems in crops like legumes and oilseeds.
  • Seed Treatment Additive: Added to seed coatings to correct molybdenum deficiency, especially in acidic soils where natural Mo availability is low, enhancing early root development and nodulation.

2. Performance Chemicals

  • Precursor for Hydrodesulfurization Catalysts: AHM is thermally decomposed to form MoO₃, which is then used with cobalt or nickel on alumina supports to produce HDS catalysts for removing sulfur from petroleum fractions.
  • Catalyst in Oxidation and Dehydration Processes: Used in selective oxidation of alcohols and hydrocarbons and in production of formaldehyde, acrylic acid, and other intermediates in the chemical industry.
  • Reagent for Phosphate and Silicate Determination: Forms molybdenum blue complexes upon reaction with phosphate or silicate ions, widely used in water and soil testing, fertilizer analysis, and lab research.
  • Titration and Complexation Studies: Used in complexometric titrations or as a source of Mo(VI) in analytical studies involving transition metals or ligand behavior.

3. Metal Treatment 

  • Raw Material for Molybdenum Metal Production: AHM is reduced with hydrogen to produce pure molybdenum powder, used in alloy steels, high-performance superalloys, and aerospace applications.
  • Additive for High-Strength Steels: Supplies molybdenum in steel melting to increase toughness, wear resistance, and thermal stability, crucial for tooling, automotive, and military-grade components.

4. Paints, Coatings & Adhesives

  • Intermediate for Molybdate Pigments: AHM is converted into zinc, calcium, or barium molybdates used as non-toxic corrosion-inhibiting pigments in protective industrial and marine paints.
  • Molybdate Orange Production: Combined with lead chromate to form bright orange pigments with high UV and weather resistance for use in plastics, rubber, and coatings.

Specifications

Assay ≥ 99.0% (MoO₃ basis, typical analytical grade)
Appearance White or colorless crystalline powder
Odor Odorless
Boiling Point Decomposes before boiling
Melting Point Decomposes at ~190–200 °C
Density ~2.5 g/cm³ (at 20 °C)
Solubility Soluble in water; insoluble in alcohol and acetone
Viscosity Not applicable (solid)
Flash Point Not flammable; not applicable for inorganic salts

Hazard Symbols

Irritants/Sensitisers/Other Hazards

FAQs

1. What is the current price of Ammonium heptamolybdate in India?
The price Ammonium heptamolybdate can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.6301 00 6301 directly for a customized quote tailored to your needs.

2. Where can I buy Ammonium heptamolybdate in India?
You can purchase Ammonium heptamolybdate from MULTICHEM, a leading exporter with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across global markets. For more details on how to place an order, please visit our website or contact our sales team.

3. What is the minimum order quantity (MOQ) for Ammonium heptamolybdate?
Our minimum order quantity (MOQ) Ammonium heptamolybdate is designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Ammonium heptamolybdate supplied by Multichem?                   
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.