Ammonium Metatungstate Hydrate (Ammonium Metatungstate) has a number of unique properties that are important for its application and handling. Below are the key properties of Ammonium Metatungstate Hydrate:
Appearance and Color
Ammonium metatungstate hydrate usually appears as a white or slightly yellow crystalline powder.
Solubility
Ammonium metatungstate hydrate is soluble in water and in ethanol, but insoluble in benzene. Its solubility is affected by various factors such as temperature, pH, and type of solvent.
Acid-base
The aqueous solution of ammonium metatungstate hydrate is weakly acidic, with pH value generally between 3.0-4.5.
Thermal stability
Ammonium metatungstate hydrate is not stable at high temperature, it will gradually lose crystallization water and may further decompose into tungsten oxide and other products. Its decomposition temperature is usually between 400-500°C, but the exact temperature may vary depending on the heating conditions, type of atmosphere and purity of raw materials.
Chemical reactivity
Ammonium metatungstate hydrate can react chemically with a variety of substances, such as reacting with acid to form the corresponding tungstate and reacting with alkali to form tungsten hydroxide. These reactions can be used to prepare other tungsten compounds or to adjust their chemical properties.
Safety information
Ammonium metatungstate hydrate is a hazardous chemical and has a certain degree of toxicity. It is necessary to follow the appropriate safety regulations during handling and storage, such as wearing protective gloves and glasses, etc., and keeping it well ventilated and avoiding sources of ignition.
Other properties
Ammonium metatungstate hydrate also has a certain degree of hygroscopicity and caking, so it needs to pay attention to moisture-proof and anti-caking measures during storage and transportation.
Ammonium metatungstate hydrate is easily soluble in water, weakly acidic, easy to decompose at high temperature, etc. These properties determine its application scope in industrial production and scientific research. At the same time, because it belongs to dangerous chemicals, it needs to pay special attention to safety issues during handling and storage.
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