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Specialty Gases Reference Guide

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Technical Data Physical Properties Name Chemical Formula 2008 TLV ppm Acetylene Air Ammonia Argon Arsine Boron Trichloride Boron Trifluoride Butadiene, 1,3- Butane, n- Butene, 1- Carbon Dioxide Carbon Monoxide Chlorine Deuterium Dichlorosilane Disilane Ethane Ethylene Halocarbon-14 Halocarbon-22 Halocarbon-23 Halocarbon-116 Halocarbon-134A Halocarbon-218 Halocarbon-C318 Helium Hexane, n- Hydrogen Hydrogen Bromide Hydrogen Chloride Hydrogen Sulfide C2 H2 N/A NH3 Ar AsH3 BCl3 BF3 CH2:CHCH:CH2 C4 H10 CH3 CH2 CO2 CO Cl2 D2 SiH2 Cl2 (SiH3 C2 H6 CH2 CF4 CHClF2 CHF3 C2 F6 CF3 C3 C4 CH2 F8 F8 He C6 H2 F :CH2 )2 CH:CH2 mg/m3 Simple Asphyxiant N/A 25 Simple Asphyxiant 0.005 None Established C 1.0 2.0 1000 250 5000 25 0.5 Flammable Range LEL air 2.5 N/A 17 0.016 C 3.0 4.0 2377 574 9000 29 1.0 Simple Asphyxiant None Established 5 13 1000 200 1230 229 None Established 1000 3537 H14 None Established None Established None Established None Established None Established Simple Asphyxiant 50 HBr HCl H2 S Simple Asphyxiant C 2.0 C 2.0 10 14 N/A 16 Nonflammable 5.1 UEL air 100 N/A 25 78 Nonflammable Pungent, Nonflammable Pungent, 2.0 1.9 1.6 11.5 8.5 10.0 Nonflammable 12 Nonflammable 5.0 4.7 75 75 99 Unknown, Pyrophoric 1000 2.7 1230 36 180 C 7 C 3 Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable 1.1 4.0 Nonflammable Nonflammable 4.3 Odor IDLH ppm Ethereal None Pungent, Irritating None Garlic-like Irritating Suffocating Mildly Aromatic Natural Gas-like Natural Gas-like None None Pungent, Irritating None 300 3 100 25 2000 40000 1200 10 Pungent, Suffocating 100 Repulsive, Choking None Sweet None Nearly Odorless None None 7.5 75 Slightly Ethereal Slightly Sweet None None Mild None Irritating 46 30 Pungent, Suffocating 50 Rotten Eggs 100 H 7 1-877-PRAXAIR www.praxair.com/specialtygases

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