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Can copper oxidize without water

Copper does not react with water but slowly reacts with atmospheric oxygen, forming a layer of brown-black copper oxide. In contrast to the oxidation of iron by wet air, this oxide layer stops further bulk corrosion. The formation of copper oxide from copper in the presence of oxygen is a 2 Cu + O 2 2 CuOA. Copper, in its metallic state, does not affect the skin. It becomes a potential irritant or allergen when it is corrupted to become soluble through the action of exudates encountered on the skin surface or in a relatively corrosive physiological environment such as the oral cavity or the uterus3. This process is called oxidation, and it happens when the copper combines with the oxygen and moisture in the air and loses some of its protons. This causes the colour of the metal to change to a deeper orange. Oxidation can also cause copper to develop purple and blue streaks. Acetic acid removes copper oxide without attacking the copper film since acetic acid does not oxidize the copper surface. Acetic acid also has a low surface tension of 27.8 dyn/cm, allowing easy removal from a surface. Wear appropriate personal protective equipment: coveralls, gloves & eye protection. Environmental Precautions: Do not allow to enter drains or watercourses. Hazardous Decomposition Products: Copper oxide fume. Symptoms of Exposure: This may cause chills, flushing, fatigue, muscle and stomach aches, dyspnea, and nausea if inhaled fumes. Dust may irritate skin and eyes. If you are looking for high quality, high purity and cost-effective copper oxide, or if you require the latest price of copper oxide, please feel free to email contact mis-asia.

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