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n <br />U <br />• <br />Copper <br />Copper dust is an odorless solid. <br />Short-term exposure to copper dust can cause a feeling of illness <br />similar to the common cold with sensations of chills and stuffiness <br />of the head. Small copper particles may enter the eye and cause <br />irritation, discoloration, and damage. <br />The TWA of the PEL for copper dust is 1 mg/m3. <br />15 <br />