Ammonium metavanadate
[CAS# 7803-55-6]

Identification

• Classification: Inorganic chemical industry >> Inorganic salt >> Inorganic ammonium salt
• Name: Ammonium metavanadate
• Molecular Formula: NH₄VO₃
• Molecular Weight: 116.97
• CAS Registry Number: 7803-55-6
• EC Number: 232-261-3
• SMILES: [NH4+].[O-][V](=O)=O

Properties

• Density: 2.32
• Melting point: 200 °C
• Water solubility: 5.1 g/L (20 °C)

Safety Data

• Hazard Symbols: GHS06;GHS07;GHS08;GHS09 Danger
• Risk Statements: H301-H315-H319-H330-H332-H335-H341-H361-H361d-H372-H411
• Safety Statements: P203-P260-P261-P264-P264+P265-P270-P271-P273-P280-P284-P301+P316-P302+P352-P304+P340-P305+P351+P338-P316-P317-P318-P319-P320-P321-P330-P332+P317-P337+P317-P362+P364-P391-P403+P233-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	3	H301
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin irritation	Skin Irrit.	2	H315
Acute toxicity	Acute Tox.	1	H330
Germ cell mutagenicity	Muta.	2	H341
Acute toxicity	Acute Tox.	4	H332
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Specific target organ toxicity - repeated exposure	STOT RE	1	H372
Reproductive toxicity	Repr.	2	H361
Reproductive toxicity	Repr.	2	H361d
Acute toxicity	Acute Tox.	2	H330
Serious eye damage	Eye Dam.	1	H318
Acute toxicity	Acute Tox.	1	H300
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Carcinogenicity	Carc.	2	H351
Acute toxicity	Acute Tox.	3	H331
Eye irritation	Eye Irrit.	2A	H319
Acute toxicity	Acute Tox.	4	H302

• Transport Information: UN 2859

Discovery and Applications

Ammonium metavanadate (NH₄VO₃) is an important vanadium compound with a variety of industrial uses. It was discovered in the late 19th century and plays a key role in various chemical processes and materials due to its unique properties.

Ammonium metavanadate was first synthesized in 1896 by French chemist Paul Lebeau. The compound is formed by the reaction of vanadium pentoxide with ammonium hydroxide. It appears as a yellow to orange crystalline solid and is known for its unique color and chemical reactivity.

Ammonium metavanadate is characterized by being soluble in water, forming a yellow solution. It has a relatively low melting point of 65°C. The compound is a source of vanadium, an element used in a variety of catalytic and industrial processes. Its chemical structure enables it to participate in redox reactions and is of great value in both synthetic and analytical chemistry.

The main use of ammonium metavanadate is as a catalyst for various chemical reactions. It is used in the production of sulfuric acid and in the synthesis of organic chemicals. Its ability to promote redox reactions makes it an essential ingredient in industrial catalysts.

In materials science, ammonium metavanadate is used to produce vanadium-based materials, such as vanadium pentoxide. These materials are important in the manufacture of high-performance ceramics and batteries, including lithium-ion batteries, due to their excellent electrical conductivity and stability.

The compound is also used to produce pigments and dyes. Its bright color properties make it suitable for a variety of colorants and coatings. It is used to make ceramic glazes and inks, and its colors are suitable for artistic creations.

In analytical chemistry, ammonium metavanadate is used as a reagent to detect and quantify a variety of substances. Its reactivity with other chemicals makes it useful in assays and tests, especially in detecting reducing agents and redox titrations.

Research continues to explore new applications for ammonium metavanadate, especially in the areas of green chemistry and sustainable materials. Innovations in vanadium chemistry may lead to more efficient catalysts and advanced materials with reduced environmental impact.

References

2016. Novel chemical synthesis and characterization of copper pyrovanadate nanoparticles and its influence on the flame retardancy of polymeric nanocomposites. Scientific Reports, 6(1).
DOI: 10.1038/srep25231

2024. Recent Advancements in Fabrication of NdVO4 Nanomaterials and Their Versatile Applications in Catalysis and Biomedical. Topics in Catalysis, 67(15).
DOI: 10.1007/s11244-024-02036-1

2024. Tailoring vanadium pentoxide nanoparticles for humidity sensing: impact of microwave annealing. Journal of Materials Science, 59(42).
DOI: 10.1007/s10853-024-10485-y