CHEMICAL SUBSTANCES TLVs^®
2003 NOTICE OF INTENDED CHANGES (NIC)
Aliphatic hydrocarbon gases,
     Alkane [C₁-C₄]
Allyl propyl disulfide
Beryllium and compounds
Butane (withdraw adopted TLV®; see
     proposal for Aliphatic hydrocarbon gases)
Carbofuran
Diesel exhaust particulate,
      as elemental see
      carbon (withdrawn from NIC)
Dimethyl sulfide
Dodecyl mercaptan
Ethane (withdraw status as simple
     asphyxiant; see proposal for Aliphatic
     hydrocarbon gases)
Ethylene
Hexahydrophthalic anhydride, see
     All isomers
Hydrogen bromide
Hydrogen sulfide
L.P.G. (Liquefied petroleum gas) see
      (withdraw adopted TLV®; see
     see proposal for Aliphatic see
     hydrocarbon gases)
Manganese and inorganic compounds
Methane (withdraw status see
     as simple asphyxiant; see see
     proposal for Aliphatic see
     hydrocarbon gases)
Mineral oil
Molybdenum, Soluble compounds see
      (withdrawn from NIC; see
     adopted TLV® retained)
Natural rubber latex, see
     as total proteins
Oil mist, mineral (withdraw
   entry and adopted TLVs®;
   see entry for Mineral oil)
Perfluorobutyl ethylene
Phenyl mercaptan
Propane (withdraw see
     adopted TLV®; see proposal for see
     Aliphatic hydrocarbon gases)
n-Propanol
Propylene
Pyridine
Sulfuric acid
Toluene-2,4- or -2,6-diisocyanate
Wood dusts

2003 ADOPTIONS
2-Butoxyethanol (EGBE)
2-Butoxyethyl acetate (EGBEA)
Caprolactam
Chlorpyrifos
Cyclohexanone
Diazinon
EPN
Ethion
Hydrogen chloride
Isobutyl nitrite
Isopropanol
Isopropyl acetate
Kerosene/Jet fuels, as
   total hydrocarbon vapor
Magnesium oxide
Malathion
Mevinphos
Parathion
Particulates (Insoluble)
   Not Otherwise Specified
   (adopted TLVs® withdrawn;
   see Appendix E)
Silicon carbide
Trichlorphon
Turpentine and selected
   monoterpenes
N-Vinyl-2-pyrrolidone
Zinc oxide

2003 UNDER STUDY LIST
Acetylene tetrabromide
Acrylamide
Alachlor
Aldrin
Aluminum and compounds
Arsine
Benzofuran
Borates
Bromochloromethane
Bromodichloromethane
Bromoform
1-Bromopropane
sec-Butyl acetate
n-Butyl glycidyl ether [BGE]
tert-Butyl hydroquinone [TBHQ]
Carbaryl
Carbon black
Chloroacetic acid
Chrysene
Coal tar pitch volatiles, as benzene solubles
Copper/Copper oxide
Coumaphos
Creosote
Cresol
Dichloroacetic acid
1,3-Dichloropropene
Dicyclopentadiene
Diesel exhaust
Diethanolamine
1,4-Diethyl benzene
Diethylene glycol monobutyl ether
Diethylhydroxyamine [DEHA]
Diglycidyl ether [DGE]
Dimethyl disulfide
Divinyl benzene
Endosulfan
Ethanol [Ethyl alcohol]
2-Ethoxyethanol [EGEE]
2-Ethoxyethyl acetate [EGEEA]
Ethyl acetate
Ethyl acrylate
Ethyl amyl ketone [5-Methyl-3-heptanone]
Ethyl benzene
Ethyl cyanoacrylate
Ethyl ether [Diethyl ether]
Ethyl formate
Ethyl mercaptan
Fenamiphos
Fensulfothion
Fenthion
Ferbam
Fonofos
Furfural
Furfuryl alcohol
Gallium arsenide
Gasoline, unleaded
Hydrogen fluoride
Hydroquinone
Iron oxide/Rouge
Isoamyl alcohol
Isobutene
Isopropyl ether
Isopropyl glycidyl ether [IGE]
Maleic anhydride
Metal working fluids
Methanol
Methomyl
2-Methoxyethanol [EGME]
2-Methoxyethyl acetate [EGMEA]
1-Methoxy-2-propanol
Methylacrylonitrile

PHYSICAL AGENTS TLVs^®
2003 NOTICE OF INTENDED CHANGES (NIC)
Acoustic — Noise
Ergonomics — Lifting

2003 ADOPTIONS
None

2003 UNDER STUDY LIST

1. Issues
   • Carcinogenicity of physical agents - known and suspected.
   • Combined effects with chemical substances (e.g., noise and chemical exposure interaction).
   • Reproductive hazards.
2. Acoustic
   • Impulse noise, including blast over-pressure.
3. Ergonomics
   • Hand Activity Level.
   • Hand-Arm Vibration.
   • Musculoskeletal disorders.
4. Nonionizing Radiation and Fields
   • Extremely low frequency (ELF) magnetic fields.
   • Contact currents.
   • Radiofrequency (RF) and ultra-wide-band communications.
5. Thermal Stress
   • Cold stress.
6. Hyperbaric and Hypobaric Environments

BIOLOGICAL EXPOSURE INDICES (BEIs^®)
2003 NOTICE OF INTENDED CHANGES (NIC)
Aniline
Chromium (VI), Water-soluble fume
Cyclohexanol
Cyclohexanone
Dichloromethane
Polycyclic aromatic hydrocarbons (PAHs)
Trichloroethylene

2003 ADOPTIONS
n-Hexane
Methyl n-butyl ketone
Styrene

2003 UNDER STUDY LIST
Chemical Substances
Acrylonitrile
Aluminum
1,3-Butadiene
2-Butoxyethanol
Carbon disulfide
Chlorobenzene
Ethyl benzene
Fluorides
Furfural
Mercury
Methanol
Methyl formate
n-Methyl pyrrolidone
Pentachlorophenol
Phenol
2-Propanol
Uranium, natural

Feasibility Assessment
Acrylonitrile
Antimony
Beryllium
Chlorpyrifos
1,4-Dichlorobenzene
2,4-Dichlorophenoxyacetic acid
2-Ethyl hexanoic acid
Hydrazines
Inorganic borates
Manganese
Methyl tert-butyl ether
Methyl n-butyl ketone
Nickel
Selenium
Trimethylbenzene
Vinyl chloride

Other Issues

1. Genetic and macromolecular markers of exposure.
2. Quality control in biological monitoring.
3. Methemoglobin inducers.
4. Effect of physical exertion on body burden and the BEI®.