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Material Safety Data Sheet(MSDS)

Questions And Answer

• Physical Properties

  Cupric fluoride is a white crystalline solid; monoclinic crystals; turns blue in moist air; sparingly soluble in water (hydrolyzes in hot water). The dihydrate is blue monoclinic crystal;slightly soluble in water. ;

• Uses

  Copper(II) fluoride is used in cathodes in nonaqueous galvanic cells, such as high energy batteries. It also is used as a fluorinating agent. The dihydrate is used in welding and brazing fluxes and is added to cast iron to improve its strength. Another application of this compound is as opacifier in ceramics, glasses and enamels. ;

• Preparation

  Copper(II) fluoride is prepared by direct fluorination of copper at high temperatures:
  Cu + F2 → CuF2
  It also may be prepared by passing hydrogen fluoride gas over copper(II) oxide at 400°C:
  CuO + 2HF→ CuF2 + H2O
  Alternatively, it may be made by treating copper carbonate with hydrofluoric acid followed by crystallization.
  CuCO3 + 2HF(aq) → CuF2 + H2O + CO2 ;

• Reactions

  Copper(II) fluoride loses fluorine as it melts. At 950°C it converts to copper( I) fluoride (cuprous fluoride), CuF:
  2CuF2 →2CuF + F2
  Also, when it is heated at 1,200°C in an atmosphere of hydrogen fluoride, copper( I) fluoride is produced.
  Reaction with water is slow, forming a hydrate. The product decomposes slowly at ambient temperature with liberating hydrogen fluoride, leaving a basic fluoride, CuFOH. The dihydrate hydrolyzes to oxyfluoride Cu(OF)2 in hot water. ;

• Toxicity

  Cupric fluoride is moderately toxic by ingestion and other routes of exposure. ;

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