Chemical Symbol Zn. Element No. 30 of the periodic system; atomic weight 65.38. Blue-white metal; when pure, malleable and ductile even at ordinary temperatures; melting point 419ºC (787ºF.), specific gravity 7.14. Can be electrodeposited; it is extensively used as a coating for steel, especially steel destined for use in construction, transportation, and electrical equipment. Sheet zinc finds many outlets, such as dry batteries, etc. Its most important alloy is brass. Of great importance in die casting, although new ZA (zinc-aluminum) alloy is becoming a major force in die casting. Compounds and dusts used by agricultural, chemical, paint, and rubber industries.