TLV^®/BEI^® DEVELOPMENT PROCESS: AN OVERVIEW
2013 NOTICE OF INTENDED CHANGES (NIC)
Note: See http://www.acgih.org/TLV/Proposed_
TLV-BEI_Development_Process.pdf for proposed revisions to the TLV^®/BEI^® Development Process: An Overview section. Proposed revisions include a revised submission deadline for comments.

CHEMICAL SUBSTANCES TLVs^®
2013 NOTICE OF INTENDED CHANGES (NIC)
Acetaldehyde
Acetone
Argon (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Atrazine
Barium sulfate
1-Bromopropane
Dimethylamine
Ethyl isocyanate
Ethylidene norbonene
Helium (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Hydrogen (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Methomyl
Methyl formate
Methyl isocyanate
Naphthalene
Neon (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Nickel carbonyl
Nitrogen (withdraw adopted Documentation;
    refer to Appendix F: Minimal Oxygen
    Content)
Pentachlorophenol
Pentane, all isomers
Peracetic acid
Phenyl isocyanate
Simazine
Titanium dioxide
Toluene-2,4- or 2,6-diisocyanate (or as
    a mixture)
Trichloroacetic acid
1,2,3-Trichloropropane
Triethylamine

2013 NOTICE OF INTENDED CHANGES (NIC) – UPDATES OF SENSITIZER (SEN) NOTATIONS TO DERMAL SENSITIZER (DSEN) AND/OR RESPIRATORY SENSITIZER (RSEN). THE FOLLOWING SUBSTANCES ARE PLACED ON THE NIC FOR REVIEW OF THIS NOTATION ONLY
Alachlor
Allyl propyl disulfide
Azinphos-methyl
Benomyl
Beryllium and compounds, as Be
n-Butyl acrylate
n-Butyl glycidyl ether
Captan
Citral
Demeton-S-methyl
Dichlorvos
Dodecyl mercaptan
Flour dust
Glyoxal
Hexahydrophthalic anhydride, all isomers
Hydroquinone
2-Hydroxypropyl acrylate
Maleic anhydride
Methyl acrylate
Methyl methacrylate
Naled
Natural rubber latex, as inhalable
    allergenic proteins
Phenyl glycidyl ether
Phthalic anhydride
Piperazine and salts, as piperazine
Propylene dichloride
Propylene oxide
Rosin core solder thermal decomposition
    products (colophony)
Tetrakis (hydromethyl) phosphonium salts
     Tetrakis (hydromethyl) phosphonium
         chloride
     Tetrakis (hydromethyl) phosphonium
         sulfate
Thiram
Trimellitic anhydride
Turpentine and selected monoterpenes
Wood dusts
     Western red cedar
     All other species
     Carcinogenicity
         Oak and beech
         Birch, mahogany, teak, walnut
         All other wood dusts

2013 ADOPTIONS
Aliphatic hydrocarbon gases, Alkalines
    [C₁-C₄] (Documentation and TLV^®
    withdrawn; Methane, Ethane, Propane,
    Liquefied petroleum gas (LPG) and
    Natural gas – refer to Appendix F:
    Minimal Oxygen Content. Butane
    and Isobutane – refer to Butane,
    all isomers)
Butane, all isomers
Clopidol
2,4-D
Diethylene glycol monobutyl ether
N,N-Diethylhydroxylamine
Ethyl tert-butyl ether
Glycerin mist (Adopted Documentation
    and TLV^® withdrawn)
Manganese, elemental and inorganic
    compounds, as Mn
1-Methoxy-2-propanol
Methyl isoamyl ketone
Tributyl phosphate

2013 UNDER STUDY LIST
Chemical Substances
Acetamide
Acetylene
Acrylonitrile
Antimony and compounds, as Sb
Antimony hydride
Antimony trioxide
Benz[a]anthracene
Benzene
Benzidine
Benzo[b]fluoranthene
Benzo[a]pyrene
Borate compounds, inorganic
Boron tribromide
Boron trifluoride
Bromodichloromethane
n-Butyl acetate
sec-Butyl acetate
tert-Butyl acetate
tert-Butyl hydroperoxide
n-Butyl isocyanate
Calcium silicate, naturally occurring
    as wollastonite
Calcium silicate, synthetic nonfibrous
Catechol
Chlorine
Chlorine dioxide
Chromite ore processing (Chromate),
    as Cr
Chromium and inorganic compounds,
    as Cr
Chromyl chloride
Chrysene
Coal tar pitch volatiles, as benzene
    soluble aerosol
Cobalt and inorganic compounds,
    as Co
Cobalt carbonyl
Cobalt hydrocarbonyl
Creosote
Dibutyl phthalate
3,3´-Dichlorobenzidine
1,3-Dichloro-5,5-dimethyl hydantoin
Dicyclopentadiene
Diethyl phthalate
Di(2-ethylhexyl)phthalate
N,N-Dimethyl acetamide
Dimethyl carbamoyl chloride
Dimethyl phthalate
Dimethylformamide
Dipropyl ketone
1-Ethoxy-2-propylene
Ethyl acrylate
Ethyl cyanoacrylate
Ethylene glycol
Fluorides, as F
Fluorine
Formaldehyde
Formamide
Furfuryl alcohol
Germanium tetrahydride
Gluteraldehyde
Glyoxal
Hard metals, Cobalt and Tungsten
    carbide
Hexamethylene diisocyanate
Hexylene glycol
Hydroquinone
Iodoform
Isooctyl alcohol
Isophorone diisocyanate
Lead and inorganic compounds,
    as Pb
Lithium hydride
Maleic anhydride
Mercury, alkyl compounds
2-Methoxymethylethoxy propanol
Methyl acetylene
Methyl acrylate
Methyl mercaptan
N-Methylpyrrolidone
Methyl vinyl ketone
Methylene bis(4-cyclohexylisocyanate)
Methylene bisphenyl isocyanate
1-Naphthylamine
2-Naphthylamine
Nickel and inorganic compounds,
    including Nickel subsulfide, as Ni
Nitric acid
Paraquat
Performic acid
Phosgene
Phosphine
o-Phthalaldehyde
Phthalic anhydride
Polycyclic aromatic hydrocarbons
Polymeric MDI