Ammonium hexafluorotitanate, with the chemical formula (NH4)2TiF6, is a chemical compound composed of ammonium ions (NH4+) and hexafluorotitanate ions (TiF6^2-). It is a white crystalline solid that is sparingly soluble in water.

Ammonium hexafluorotitanate has several key properties and uses:

1. Titanium Source: It is used as a source of titanium in various chemical reactions and processes.
2. Etching Agent: Ammonium hexafluorotitanate is used in the glass industry as an etching agent. It can selectively remove glass from the surface of glassware or optical components, creating intricate patterns or designs.
3. Metal Surface Treatment: It is used in metal surface treatment processes, particularly in the preparation of certain metals for coatings or further chemical reactions.
4. Laboratory Reagent: Ammonium hexafluorotitanate is used as a laboratory reagent in certain chemical reactions and analyses.

Ammonium hexafluorotitanate is generally considered safe to handle under normal conditions. However, as with any chemical compound, it should be handled with care, and proper safety precautions should be followed to avoid unnecessary exposure.

In the glass industry, ammonium hexafluorotitanate is particularly important for its role in glass etching, allowing for the creation of decorative and functional glassware. Its ability to provide titanium ions makes it valuable in various chemical processes where titanium reactivity is needed. Additionally, it finds applications in metal surface treatment and as a reagent in laboratory settings.