1. Antimony CAS # 7440-36-0, Sept, 1995;Agency for Toxic Substances and Disease Registry (ATSDR),1995
2. Thallium CAS # 7440-28-0;Agency for Toxic Substances and Disease Registry (ATSDR),1995
3. Silver CAS # 7440-22-4;Agency for Toxic Substances and Disease Registry (ATSDR),1999
4. Beryllium CAS # 7440-41-7;Agency for Toxic Substances and Disease Registry (ATSDR),2002
5. Fluorides, Hydrogen Fluoride, and Fluorine CAS # 7681-49-4, 7664-39-3, 7782-41-4;Agency for Toxic Substances and Disease Registry (ATSDR),2003