Hazardous Chemical Substances and Safety Management System

Yttrium barium copper oxide (YBCO) is a crystalline compound with important property of ‘high temperature superconductor’ above the boiling point (77 K) of liquid nitrogen. YBCO is sensitive to air and moisture. Exposures to YBCO have been reported to cause skin irritation, serious eye irritation, and respiratory irritation. Symptoms of systemic copper poisoning may include capillary damage, headache, cold sweat, weak pulse, kidney and liver damage, central nervous system excitation followed by depression, jaundice, convulsions, paralysis, and coma. Death may occur from shock or renal failure. Chronic copper poisoning is typied by hepatic cirrhosis, brain damage and demyelination, kidney defects, and copper deposition in the cornea as exemplied by humans with Wilson’s disease. It has also been reported that copper poisoning has led to haemolytic anaemia and accelerates arteriosclerosis. There is no more published information on the chemical, physical, and toxicological properties of YBCO. Occupational workers, during handling and storage of YBCO, should be alert and follow precautions. The container should be tightly closed and stored in a cool, dry, and well-ventilated place. Workers should handle YBCO in accordance with good industrial hygiene and safety practice.