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BerZll ium <br />Beryllium is a silvery gray metal. <br />Short-term exposure to beryllium can cause pain below the sternum, <br />weight loss, nonproductive cough, shortness of breath, and <br />irritation of the eyes, respiratory system, and skin. <br />The TWA of the PEL for beryllium is 0.002 mg/m3. <br />11 <br />