National Toxicology Program

The following is a list of available public comments received on substances nominated for possible listing, change in listing status or possible removal from the RoC for the 9th through the current edition of the RoC. For each substance, the comments are organized by the Federal Register notices soliciting information on that substance.

• Alcoholic Beverage Consumption
• 1-Amino-2,4-dibromoanthraquinone (DBAQ)
• Aristolochic Acids
• Asphalt fumes
• Atrazine
• Benzidine Dye Class (Dyes Metabolized to Benzidine)
• Benzofuran
• Beryllium and Beryllium Compounds
• 2,2-Bis-(bromomethyl)-1,3-Propanediol (technical grade)
• Boot & Shoe Manufacturing
• 1,3-Butadiene
• Cadmium and Cadmium Compounds
• Captafol
• Ceramic Fibers (Respirable Size)
• Chloramphenicol
• Chloroprene
• Cobalt Sulfate
• Cobalt-Tungsten Carbide: Powders and Hard Metals
• Diazoaminobenzene (DAAB)
• 2,3-Dibromo-1-propanol (DBP)
• Diesel Exhaust Particulates
• Diethanolamine
• Di (2-ethylhexyl) phthalate (DEHP)
• 3,3'-Dimethoxybenzidine Dye Class (Dyes metabolized to 3,3'-Dimethoxybenzidine)
• 3,3'-Dimethylbenzidine Dye Class (Dyes metabolized to 3,3'-Dimethylbenzidine)
• Selected DNA Topoisomerase II Inhibitors (3 Candidate Substances)
• Estrogens, Steroidal
• Ethyl Acrylate
• Ethylene Oxide
• Formaldehyde
• Glass Wool Fibers
• Hepatitis B Virus (HBV)
• Hepatitis C Virus (HCV)
• Heterocyclic Amines (Selected)
  • 2-Amino-3,4-dimethylimidazo[4,5-f]quinoline (MeIQ)
  • 2-Amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx)
  • 2-Amino-3-methylimidazo[4,5-f]quinoline (IQ)
  • 2-Amino-1-methyl-6- phenylimidazo [4,5-b]pyridine (PHiP)
• Human Papillomaviruses (HPVs), Genital-Mucosal Types
• Isoprene
• Lead and Lead Compounds
• Metalworking Fluids
• Methyleugenol
• Methyl-t-Butyl Ether ( MtBE)
• Naphthalene
• Neutrons
• Nickel Compounds and Metallic Nickel
  • Nickel and Nickel Compounds
  • Metallic Nickel & Nickel Alloys
• Nitrobenzene
• Nitromethane
• ortho-Nitrotoluene
• Oxazepam
• Phenolphthalein
• Riddelliine
• Saccharin
• Silica, Crystalline (Respirable Size)
• Strong Inorganic Acid Mists Containing Sulfuric Acid
• Styrene
• Styrene-7,8-oxide
• Talc (2000; Asbestiform and Non-asbestiform)
• Talc (2004; Cosmetic talc, Occupational exposure to talc)
• Tamoxifen
• 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD)
• Tetrafluoroethylene
• 4,4'-Thiodianiline
• Tobacco-Related Exposures
  • Tobacco Smoking
  • Environmental Tobacco Smoke
  • Smokeless Tobacco
• Trichloroethylene (1997)
• Trichloroethylene (2000)
• Ultraviolet Radiation Related Exposures
  • Solar Radiation & Exposure to Sunlamps or Sunbeds
  • Ultraviolet (UV) Radiation, Broad Spectrum and UVA, UVB, and UVC
• Vinyl Bromide
• Vinyl Fluoride
• Vinyl Mono-Halides as a class
• Wood Dust
• X-Radiation and GAMMA (g)-Radiation