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Specialty Gases Reference Guide

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Technical Data Physical Properties Name Chemical Formula 2008 TLV ppm Isobutane Isobutylene Krypton Methane Methyl Chloride Neon Nitric Oxide Nitrogen Nitrogen Dioxide Nitrogen Trifluoride Nitrous Oxide Oxygen Pentane, n- Phosphine Propane Propylene Silane Silicon Tetrachloride Sulfur Dioxide Sulfur Hexafluoride Trichlorosilane Tungsten Hexafluoride Xenon CH(CH3 (CH3 Kr CH4 CH3 Ne NO N2 NO2 NF3 N2 O O2 C5 H12 PH3 C3 H8 CH2 :CHCH3 SiH4 SiCl4 SO2 SF6 SiHCl3 WF6 Xe Cl )2 )3 C:CH2 1000 250 mg/m3 2378 574 Simple Asphyxiant 1000 50 Simple Asphyxiant 25 31 Simple Asphyxiant 3.00 10 50 N/A 600 0.30 1000 500 5.00 5.60 29 90 N/A 1770 0.42 1804 861 6.60 None Established 2.00 1000 5.20 5973 None Established None Established Simple Asphyxiant 656 103 Flammable Range LEL air 1.8 1.8 Nonflammable 5.0 8.1 Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable 1.5 1.6 2.1 2.0 1.4 UEL air 8.4 9.6 15 17.4 Odor IDLH ppm Slight Coal Gas None None Faintly, Sweet Ethereal 2000 None Slightly Irritating None Irritating Mold-like Slightly Sweet None 7.8 98 9.5 11.1 96 Nonflammable Nonflammable Nonflammable 7.0 Parrafinic Garlic-Like Natural Gas-like Slightly Sweet Choking 1500 50 2100 100 20 1000 Pungent, Suffocating 100 Sharp, Pungent None 83 Nonflammable Nonflammable 100 Pungent, Suffocating 100 None 30 None H 9 1-877-PRAXAIR www.praxair.com/specialtygases

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