Pure copper without oxygen or any deoxidizer residue. But it still contains very small amounts of oxygen and some impurities. According to the standard, the content of oxygen is not more than 0.003%, the total content of impurities is not more than 0.05%, and the purity of copper is greater than 99.95%.
Oxygen-free copper products are mainly used in the electronics industry. Often made of oxygen free copper plate, oxygen free copper strip, oxygen free copper wire and other copper materials.
