Reported in EPA TSCA Inventory.

OSHA PEL: TWA 5 mg(Mo)/m³
ACGIH TLV: TWA Soluble Compounds: TWA 0.5 mg(Mo)/m³ Confirmed Animal Carcinogen with Unknown Relevance to Humans

The systematic name of Ammonium molybdate is dihydroxy(dioxo)molybdenum - trioxomolybdenum (3:4) hexaammoniate tetrahydrate. With the CAS registry number 12054-85-2, it is also named as Hexaammonium molybdate tetrahydrate. The product's categories are Industrial / Fine Chemicals; Water Ttreatment Chemicals. It is white crystalline powder which is soluble in water, acid and alkali, insoluble in alcohol. What's more, it is stable and incompatible with strong acids, strong oxidizing agents. Additioanlly, this chemical should be stored in the cool and dry place and kept away from light, fire and high temperature.

The other characteristics of this product can be summarized as: (1)#H bond acceptors: 34; (2)#H bond donors: 32; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 419 Å²; (5)Density: 2.498; (6)Melting point: 190 °C. 

Preparation of Ammonium molybdate: It can be obtained by molybdenum concntrate. The following is the reaction equation.
2MoS₂+7O₂→2MoO₃+4SO₂↑
7MoO₃+6NH₃+7H₂O→(NH₄)₆Mo₇O₂₄+4H₂

Uses of Ammonium molybdate: It is used in the production of molybdenum metal, ceramics, dehydrogenation and desulphurisation catalysts. It is also used as an analytical reagent to measure the amount of phosphates, silicates, arsenates and lead in aqueous solution. In addition, this chemical is used in the fixing of metals, in electroplating and in fertilizers for crops.

When you are using this chemical, please be cautious about it as the following:
It is not only harmful by inhalation, in contact with skin and if swallowed, but also irritating to eyes, respiratory system and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing, gloves and eye/face protection.

People can use the following data to convert to the molecule structure.
1. SMILES:O=[Mo](=O)(O)O.O=[Mo](=O)=O.O=[Mo](=O)(O)O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)=O.O=[Mo](=O)(O)O.O.O.O.O.N.N.N.N.N.N
2. InChI:InChI=1/7Mo.6H3N.10H2O.18O/h;;;;;;;6*1H3;10*1H2;;;;;;;;;;;;;;;;;;/q;;;;3*+2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/p-6/r3H2MoO4.4MoO3.6H3N.4H2O/c3*2-1(3,4)5;4*2-1(3)4;;;;;;;;;;/h3*2-3H;;;;;6*1H3;4*1H2