CHEMICAL SUBSTANCES TLVs^®
2018 NOTICE OF INTENDED CHANGES (NIC) 
Introduction to the Chemical Substances
     – Threshold Limit Value-Surface 
     Limit (TLV-SL)
New notation – OTO (Ototoxicant)
Antimony trioxide (withdrawn from
     Notice of Intended Changes)
Cobalt and inorganic compounds, 
     as Co
Cumene
Cyanazine
Cyclopentadiene (withdraw adopted TLV^®
     and Documentation; see
     Dicyclopentadiene, including 
     Cyclopentadiene)
Dicyclopentadiene, including 
     Cyclopentadiene
Dimethylphenol, all isomers
Fluorine, as F
Indium tin oxide, as In
Iodine and Iodides, as I
Iodoform
Methyltetrahydrophthalic anhydride 
     isomers
Methyl vinyl ketone
Monomethylformamide
o-Phthalaldehyde
Propylene glycol ethyl ether
Sodium sulfate
Styrene
Styrene oxide
Sulfoxaflor
Tetramethyl succinonitrile
Thiacloprid
Tin and inorganic compounds, excluding 
     Tin hydride, as Sn
Trimetacresyl phosphate 
Triparacresyl phosphate

2018 NOTICE OF INTENDED CHANGES (NIC) – THE FOLLOWING SUBSTANCES ARE PLACED ON THE NIC FOR REVIEW OF THE INHALABLE FRACTION AND VAPOR (IFV) ENDNOTE ONLY
Chlordane
o-Chlorobenzylidene malononitrile
Dinitrobenzene, all isomers
Dinitro-o-cresol
EPN
Isobutyl nitrite
4,4′-Methylene bis(2-chloroaniline) 
Nitrapyrin
5-Nitro-o-toluidine
Pentachloronaphthalene
Sulfometuron methyl
Temephos
1,1,2,2-Tetrabromoethane
2,4,6-Trinitrotoluene
m-Xylene α,α′-diamine

PHYSICAL AGENTS TLVs^® 
2018 NOTICE OF INTENDED CHANGES (NIC)
Introduction to the Physical Agents
Ergonomics

• Hand–Arm vibration

Appendix A: Statement on the Occupational
     Health Aspects of New Lighting Technologies
     — Circadian, Neuroendocrine and
     Neurobehavioral Effects of Light

BIOLOGICAL EXPOSURE INDICES (BEIs^®) 
2018 NOTICE OF INTENDED CHANGES (NIC)
Introduction to the BEI^® Documentation
Ethylene oxide
N-Ethyl-2-pyrrolidone
n-Hexane
Methyl n-butyl ketone (withdraw adopted BEI^®
     and Documentation)