A miscible substance is a liquid or gas that will evenly dissolve in another. MSHA MSHA is the Mine Safety and Health Administration, the federal agency that regulates mining. It also evaluates and approves respirators. A mutagen is a substance that causes mutations. A mutation is a change in the genetic material in a body cell.
Mutations can lead to birth defects, miscarriages, or cancer.
NCI NCI is the National Cancer Institute, a federal agency that determines the cancer-causing potential of chemicals. NFPA NFPA is the National Fire Protection Association. It classifies substances according to their fire and explosion hazard. NTP NTP is the National Toxicology Program which tests chemicals and reviews evidence for cancer. OSHA OSHA is the Occupational Safety and Health Administration, which adopts and enforces health and safety standards in private workplaces.