Ammonium molybdate tetrahydrate Chemical Properties

Melting point:

190 °C

Boiling point:

190°C

Density 

2.498 g/mL at 25 °C (lit.)

storage temp. 

Inert atmosphere,Room Temperature

solubility 

H₂O: 0.05 M at 20 °C, clear, colorless

form 

Solid

color 

White to yellow-green

Odor

Odorless

PH Range

5 - 5.5

PH

4.0-5.5 (25℃, 0.05M in H2O)

Water Solubility 

400 g/L (20 ºC)

Merck 

14,533

Exposure limits

ACGIH: TWA 0.5 mg/m3
NIOSH: IDLH 1000 mg/m3

Stability:

Stable. Incompatible with strong acids, strong oxidizing agents.

CAS DataBase Reference

12054-85-2(CAS DataBase Reference)

EPA Substance Registry System

Molybdate [Mo7O24(6-)], hexaammonium, tetrahydrate (12054-85-2)

Safety Information

Hazard Codes 

Xi,Xn

Risk Statements 

36/37/38-22-20/21/22

Safety Statements 

26-37/39-36/37-36

RIDADR 

3288

WGK Germany 

1

RTECS 

QA5076000

TSCA 

Yes

HS Code 

28417000

MSDS

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Ammonium molybdate tetrahydrate Usage And Synthesis

Description

Ammonium molybdate tetrahydrate (also referred to as Ammonium heptamolybdate, chemical formula: (NH4)6Mo7O24)), appearing as a colorless solid. It can be manufactured through dissolving the molybdenum trioxide in excess amount of aqueous ammonia and evaporating the solution at the room temperature. It has many applications, e.g. as an analytic reagent for measuring content of phosphates, silicates, arsenates and lead; for the production of molybdenum metal and ceramics; for the production of dehydrogenation and desulphurization catalysts; for the fixing of metals; for electroplating; supplement in the crop fertilizer; as a negative stain in biological electron microscopy; as an analgesic in medical fields.

References

https://en.wikipedia.org/wiki/Ammonium_heptamolybdate
https://www.alfa.com/zh-cn/catalog/A13766/

Chemical Properties

White, crystalline powder. Soluble in water; insoluble in alcohol. Nonflammable.

Uses

Determination of phosphates, arsenates, and lead.

Uses

Ammonium molybdate tetrahydrate is widely utilized in cryo-negative staining which helps to visualize particles while preserving the sample. It is used as a catalyst to desulfurize thiophene and its derivatives. It serves as an analytical reagent to measure the amount of phosphates, silicates, arsenates and lead in an aqueous solution. It is also used in electroplating, in fertilizers for crops and in the production of molybdenum metal and ceramics. It is used as an analgesic in medical field.

General Description

Ammonium molybdate tetrahydrate (AMT) is a molybdenum salt. Study of its extraction from nickel-molybdenum (Ni–Mo) ore by direct hydrometallurgical method has been reported. Its degradation by combustion to form elemental molybdenum powder using metallic reducers has been investigated.

Hazard

Irritant.

Ammonium molybdate tetrahydrate(12054-85-2)Related Product Information

• Ammonium molybdate
• Ammonium hydroxide
• Ammonium citrate tribasic
• Molybdenum
• Molybdic acid
• Ammonium sulfate
• Sodium molybdate
• Ammonium acetate
• Ammonium chloride
• allyltrimethylammonium chloride
• Sodium molybdate dihydrate
• Barium molybdate
• ZINC MOLYBDATE
• AMMONIUM
• Ammonium nitrate
• AMMONIUM PHOSPHOMOLYBDATE HYDRATE
• Hexaammonium molybdate
• AMMONIUM MOLYBDATE,AMMONIUM MOLYBDATE (DI),AMMONIUM MOLYBDATE REAGENT,AMMONIUM MOLYBDATE TS
• Ammonium Heptamolybdate Tetrahydrate