CHEMICAL SUBSTANCES TLVs^®
2012 NOTICE OF INTENDED CHANGES (NIC)
Acetaldehyde
Acetone
Aliphatic hydrocarbon gases, Alkanes
    [C₁–C₄] (withdraw adopted Documentation
    and TLV^®. Methane, Ethane, Propane,
    Liquefied petroleum gas (LPG) and Natural
    gas – refer to Appendix F: Minimal Oxygen
    Content. Butane and Isobutane – refer to
    NIC entry for Butane, all isomers)
1-Bromopropane
Butane, all isomers
Clopidol
2,4-D
Diethylene glycol monobutyl ether
N,N-Diethylhydroxylamine (DEHA)
Ethyl tert-butyl ether
Glycerin, mist (withdraw adopted
    Documentation and TLV^®)
Manganese, elemental and inorganic
    compounds, as Mn
1-Methoxy-2-propanol
Methyl isoamyl ketone
Naphthalene
Peracetic acid
Toluene-2,4- or 2,6-diisocyanate (or as
    a mixture)
Tributyl phosphate
Trichloroacetic acid
1,2,3-Trichloropropane

2012 ADOPTIONS
Allyl bromide
Carbonyl sulfide
Diacetyl
Ethyl formate
Nitrogen dioxide
Nonane
Nonane, all isomers (withdraw adopted
    Documentation and TLV^®; see entry
    for Nonane)
o-Phthalodinitrile
Piperazine and salts
Piperazine dihydrochloride (withdraw
    adopted Documentation and TLV^®;
    see entry for Piperazine and salts)

2012 UNDER STUDY LIST
Chemical Substances
Acetylene
Acrylonitrile
Antimony and compounds, as Sb
Antimony hydride
Antimony trioxide, production
Argon
Atrazine (and related symmetrical
     triazines)
Barium sulfate
Benz[a]anthracene
Benzidine
Benzo[b]fluoranthene
Benzophenone
Benzo[a]pyrene
Borate compounds, inorganic
Boron tribromide
Boron trifluoride
Bromodichloromethane
sec-Butyl acetate
tert-Butyl acetate
tert-Butyl hydroperoxide
n-Butyl isocyanate
Butylated hydroxytoluene (BHT)
Calcium silicate, naturally occurring
    as wollastonite
Calcium silicate, synthetic nonfibrous
Chlorine
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
Cyanogen
Cyanogen bromide
Cyanogen chloride
Dibutyl phthalate
3,3´-Dichlorobenzidine
1,3-Dichloro-5,5-dimethyl hydantoin
Dicyclopentadiene
Diethyl phthalate
Diethylamine
Di(2-ethylhexyl)phthalate (DEHP)
N,N-Dimethyl acetamide
Dimethyl carbamoyl chloride
Dimethyl phthalate
Dimethylamine
Dimethylformamide
Dipropyl ketone
1-Ethoxy-2-propylene
Ethyl cyanoacrylate
Ethyl isocyanate
Ethylamine
Ethylene norbornene
Ethylidene norbornene
Fluorides, as F
Fluorine
Gasoline, all formulations
Hard metals, Cobalt and Tungsten carbide
Helium
Hexamethylene diisocyanate
Hydrogen
Iodoform
Isophorone diisocyanate
Lead and inorganic compounds, as Pb
Lithium hydride
Mercury, alkyl compounds
Methanol
Methomyl
Methyl acetate
Methyl acetylene
Methyl formate
Methyl isocyanate
Methyl mercaptan
Methyl vinyl ketone
Methylamine
Methylene bis(4-cyclohexylisocyanate)
Methylene bisphenyl isocyanate (MDI)
1-Naphthylamine
2-Naphthylamine
Neon
Nickel and inorganic compounds,
    including Nickel subsulfide
Nickel carbonyl
Nitric acid
Nitrogen
Paraquat
Pentachlorophenol
Pentaerythritol
Pentane, all isomers
2,3-Pentanedione
Phenyl isocyanate
Phosphine
o-Phthalaldehyde
Phthalic anhydride
Polycyclic aromatic hydrocarbons (PAHs)
Polymeric MDI
Propoxur
Silicone tetrahydride
Simazine
Stearates
Stoddard solvent
Terephthalic acid
Tetramethyl succinonitrile
Thiacloprid
Thioglycolic acid
Titanium dioxide
Triethanolamine
Triethylamine
Trimethylamine
Tungsten and compounds, as W
Tungsten carbide
Vinyl acetate
5-Vinyl-2-norbornene

Chemical Substances as Vapor and Aerosol (V) – Review for Update to Inhalable Fraction and Vapor (IFV)
Iodine and iodides
Phenyl ether, vapor
Phosphorous (yellow)
Tetramethyl lead, as Pb
Trichloronaphthalene
Warfarin
m-Xylene α,α´-diamine