Profile: Parish Chemical Company specializes in the manufacture of fine organic compounds. We deal with crown ethers, heterocycles, hydrazines, ylid salts and dyes. Our crown ethers are macrocyclic compounds containing equally spaced ether linkages in a large ring system. They form complexes with metal salts or ammonium salts. The germanium is a semi-conducting metal surrounded by silicon, tin, gallium and arsenic. It is converted to germanium tetrachloride which is purified and hydrolyzed to chemical grade germanium dioxide.