Ammonium Molybdate Tetrahydrate

Ammonium molybdate tetrahydrate is used in chemical synthesis and analytical applications.

Primary Applications
Analytical Reagent: Used to detect and quantify phosphates, silicates, and arsenates. In acidic conditions, it reacts with phosphate to form a characteristic yellow precipitate of ammonium phosphomolybdate.
Agriculture: Served as a crucial source of molybdenum, an essential micronutrient for plants. It is particularly vital for legumes (like soybeans and peas) to support nitrogen fixation.
Industrial Catalyst: Acts as a precursor for catalysts used in desulfurization and dehydrogenation in petroleum refining.
Microscopy: Employed as a negative stain in biological electron microscopy to help identify particles while preserving their structure. 

Safety & Handling
Hazards: Classified as a skin and respiratory irritant. Prolonged exposure may affect the liver and kidneys.
Storage: Store in a cool, dry place in tightly sealed containers to prevent weathering or loss of ammonia.
Regulations: Often available in ACS Reagent or Analytical Reagent (AR) grades for high-precision laboratory work.