Compressed Gas: Toxic and Hazardous Gas Classifications (2024)

GasMolecular FormulaCASPhysical State & DescriptionHazard Control PlanDescriptionHazardsCGSL Hazard ClassAcetyleneC2H274-86-2Dissolved gas - Colorless, odorlessCompressed gasColorless, odorlessFlammable, unstable, reactiveIV—AmmoniaNH37664-41-7Liquefied gasCompressed gasColorless, strong pungent odorCorrosive, non-flammableIII[Threshold Limit Values ppm: 25; Permissible Exposure Limit ppm: 50; Lethal Concentration ppm: 7338; Immediately Dangerous to Life or Health ppm: 500]ArgonAr7440–37–1Compressed gasCompressed gasColorless, odorlessSimple asphyxiantIV—ArsineAsH37784–42–1Compressed gasArsineColorless, garlic or fish-like scentHighly toxic, flammable, pyrophoricI[Threshold Limit Values ppm: 0.05; Permissible Exposure Limit ppm: 0.05; Lethal Concentration ppm: 178; Immediately Dangerous to Life or Health ppm: 3]Boron tribromideBBr310294–33–4LiquidCompressed gasColorlessToxic, corrosiveII[Threshold Limit Values ppm: 1; Permissible Exposure Limit ppm: 1; Lethal Concentration ppm: 380; Immediately Dangerous to Life or Health ppm: 50]Boron trichlorideBCl310294–34–5Compressed gasCompressed gasColorlessCorrosiveIII[Threshold Limit Values ppm: 5; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 2541; Immediately Dangerous to Life or Health ppm: 25]Boron trifluorideBF37637–07–2Compressed gasCompressed gasColorless, strong irritating pungent odorToxic, corrosiveII[Threshold Limit Values ppm: 1; Permissible Exposure Limit ppm: 1; Lethal Concentration ppm: 864; Immediately Dangerous to Life or Health ppm: 25]BromineBr27726–95–6LiquidBromineBrownish red liquid, suffocating odorHighly toxic, corrosive, oxidizerI[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 113; Immediately Dangerous to Life or Health ppm: 3]Carbon dioxideCO2124-38-9Compressed gasCompressed gasColorless, odorless, tastelessSimple asphyxiantIV[Threshold Limit Values ppm: 5000; Permissible Exposure Limit ppm: 5000; Immediately Dangerous to Life or Health ppm: 40000]Carbon monoxideCO630–08–0Compressed gasCarbon monoxideColorless, odorless, tastelessToxic, flammableIII[Threshold Limit Values ppm: 25; Permissible Exposure Limit ppm: 25; Lethal Concentration ppm: 3760; Immediately Dangerous to Life or Health ppm: 1200]ChlorineCl27782–50–5Compressed gasChlorineGreenish-yellow, pungent odor similar to bleachToxic, corrosive, oxidizerII[Threshold Limit Values ppm: 0.5; Permissible Exposure Limit ppm: 1; Lethal Concentration ppm: 293; Immediately Dangerous to Life or Health ppm: 10]Chlorine dioxideClO210049–04–4GasCompressed gasChlorine-like odorToxic, oxidizerII[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 250; Immediately Dangerous to Life or Health ppm: 5]Chlorine trifluorideClF37790–91–2Liquefied gasCompressed gasColorless, strong irritating odorToxic, oxidizer, corrosiveII[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 299; Immediately Dangerous to Life or Health ppm: 20]DeuteriumH27782-39-0Compressed gasCompressed gasColorlessFlammableIV—DiboraneB2H619278–45–7Liquefied gasDiboraneColorless, repulsively sweet odorHighly toxic, flammable, pyrophoricI[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 80; Immediately Dangerous to Life or Health ppm: 15]DichlorosilaneSiH2Cl2 (HCl)4109–96–0Liquefied gasCompressed gasColorlessToxic, corrosive, flammableII[Threshold Limit Values ppm: 2; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 314; Immediately Dangerous to Life or Health ppm: 50]EthaneC2H674-84-0Compressed gasCompressed gasColorless, odorlessFlammableIV—EthyleneC2H474-85-1Compressed gasCompressed gasColorless, sweet musky odorFlammableIV—Ethylene oxideC2H4075–21–8Liquefied gasEthylene oxideColorless, faintly sweet odorToxic, flammableIII[Threshold Limit Values ppm: 1; Permissible Exposure Limit ppm: 1; Lethal Concentration ppm: 2900; Immediately Dangerous to Life or Health ppm: 800]FluorineF27782–41–4Compressed gasHydrogen fluoridePale yellow, strong, irritating, pungentHighly toxic, corrosive, oxidizerI[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 185; Immediately Dangerous to Life or Health ppm: 25]GermaneGeH47782–65–2Liquefied gasGermaneColorlessHighly toxic, flammable, pyrophoricII[Threshold Limit Values ppm: 0.2; Permissible Exposure Limit ppm: 0.2; Lethal Concentration ppm: 620]HeliumHe7440-59-7Compressed or Liquefied gasCompressed gasColorless, odorless, tastelessSimple asphyxiantIV—HydrogenH21333-74-0Compressed gasCompressed gasColorless, odorless, tastelessFlammableIV—Hydrogen bromideHBr10035–10–6Compressed gasCompressed gasColorless, sharp, unpleasant, pungent odorToxic, corrosiveIII[Threshold Limit Values ppm: 3; Permissible Exposure Limit ppm: 3; Lethal Concentration ppm: 2860; Immediately Dangerous to Life or Health ppm: 30]Hydrogen chlorideHCl7647–01–0Compressed gasCompressed gasColorless, strongly irritatingToxic, corrosiveIII[Threshold Limit Values ppm: 5; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 2810; Immediately Dangerous to Life or Health ppm: 50]Hydrogen cyanideHCN74–90–8LiquidHydrogen cyanideColorless, faint almond-like odorHighly toxic, flammableI[Permissible Exposure Limit ppm: 4.7; Lethal Concentration ppm: 40; Immediately Dangerous to Life or Health ppm: 50]Hydrogen fluorideHF7664–39–3Liquefied gasHydrogen fluorideColorless, strong irritating odorToxic, corrosiveII[Threshold Limit Values ppm: 0.5; Permissible Exposure Limit ppm: 3; Lethal Concentration ppm: 1300; Immediately Dangerous to Life or Health ppm: 30]Hydrogen iodideHI10034-85-2Liquefied gasCompressed gasColorless, pungent odorToxic, corrosiveIII[Lethal Concentration ppm: 2860]Hydrogen selenideH2Se7783–07–5Compressed gasHydrogen selenideColorless, very irritating odor like rotten eggsHighly toxic, flammableI[Threshold Limit Values ppm: 0.05; Permissible Exposure Limit ppm: 0.05; Lethal Concentration ppm: 51; Immediately Dangerous to Life or Health ppm: 1]Hydrogen sulfideH2S7783–06–4Liquefied gasCompressed gasColorless, foul odor like rotten eggsToxic, flammable, corrosiveII[Threshold Limit Values ppm: 10; Permissible Exposure Limit ppm: 10; Lethal Concentration ppm: 712; Immediately Dangerous to Life or Health ppm: 100]KryptonKr7439-90-9Compressed gasCompressed gasColorless, odorless, tastelessSimple asphyxiantIV—MethaneCH374-82-8Compressed gasCompressed gasColorless, odorlessFlammableIV—Methyl bromideCH3Br74–83–9Compressed gasCompressed gasColorless, odorless, nonflammableToxic, flammableII[Threshold Limit Values ppm: 1; Permissible Exposure Limit ppm: 1; Lethal Concentration ppm: 850; Immediately Dangerous to Life or Health ppm: 250]Methyl chlorideCH3Cl74-87-3Compressed gasCompressed gasColorless, mildly sweet odorFlammableIV[Threshold Limit Values ppm: 50; Permissible Exposure Limit ppm: 50; Immediately Dangerous to Life or Health ppm: 2000]Methyl isocyanateCH3NCO624-83-9LiquidMethylisocyanateColorlessHighly toxic, flammableI[Threshold Limit Values ppm: 0.02; Permissible Exposure Limit ppm: 0.02; Lethal Concentration ppm: 22; Immediately Dangerous to Life or Health ppm: 3]Methyl mercaptanCH3SH74–93–1Liquefied gasCompressed gasColorless, cabbage-like odorToxic, flammableII[Threshold Limit Values ppm: 0.5; Permissible Exposure Limit ppm: 0.5; Lethal Concentration ppm: 1350; Immediately Dangerous to Life or Health ppm: 150]NeonNe1/9/7440Compressed gasCompressed gasColorless, odorless, tastelessSimple asphyxiantIV—Nickel carbonylNi(CO)413463–39–3LiquidForbidden at UCSDMusty or sooty odorHighly toxic, flammableI[Threshold Limit Values ppm: 0.001; Permissible Exposure Limit ppm: 0.001; Lethal Concentration ppm: 18; Immediately Dangerous to Life or Health ppm: 2]Nitric oxideNO10102–43–9Compressed gasNitric oxideColorless, irritating odorHighly toxic, oxidizer, corrosiveI[Threshold Limit Values ppm: 25; Permissible Exposure Limit ppm: 25; Lethal Concentration ppm: 115; Immediately Dangerous to Life or Health ppm: 100]NitrogenN27727-37-9Compressed or Liquefied gasCompressed gasColorless, odorless, tastelessSimple asphyxiantIV—Nitrogen dioxideNO210102–44–0Liquefied gasNitrogen dioxideReddish-brown color, irritating odorHighly toxic, oxidizer, corrosiveI[Threshold Limit Values ppm: 3; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 115; Immediately Dangerous to Life or Health ppm: 20]Nitrous oxideN2O10024-97-2Compressed gasCompressed gasColorless, faint sweet odorOxidizerIV[Threshold Limit Values ppm: 50; Permissible Exposure Limit ppm: 50]OxygenO27782-44-7Compressed gasCompressed gasColorless, odorless, tastelessOxidizerIV—OzoneO310028-15-6In situ, dissolved gasOzoneColorless, sharp odorHighly toxic, oxidizerI[Threshold Limit Values ppm: 0.05; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 9; Immediately Dangerous to Life or Health ppm: 5]PhosgeneCOCl275–44–5Liquefied gasPhosgeneColorless, odorlike freshly cut hay or grassHighly toxicI[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 5; Immediately Dangerous to Life or Health ppm: 2]PhosphinePH37803–51–2Liquefied gasPhosphineColorless, odorlessHighly toxic, flammable, pyrophoricI[Threshold Limit Values ppm: 0.3; Permissible Exposure Limit ppm: 0.3; Lethal Concentration ppm: 20; Immediately Dangerous to Life or Health ppm: 50]Phosphorus oxychloridePOCl310025–87–3LiquidPhosphorus oxychlorideColorlessHighly toxicI[Threshold Limit Values ppm: 0.1]Phosphorus pentafluoridePF57647-19-0Liquefied gasCompressed gasColorless, strong, irritating, pungent odorToxic, oxidizer, corrosiveII[Permissible Exposure Limit ppm: 261]Phosphorus trichloridePCl312/2/7719LiquidCompressed gasColorless fuming liquid, pungent odorToxic, corrosiveII[Threshold Limit Values ppm: 0.2; Permissible Exposure Limit ppm: 0.2; Lethal Concentration ppm: 208; Immediately Dangerous to Life or Health ppm: 25]PropaneC3H874-98-6Liquefied gasCompressed gasColorlessFlammableIV[Permissible Exposure Limit ppm: 1000]Selenium hexafluorideSeF67783–79–1Compressed gasSelenium hexafluorideColorless, strong, irritating, repulsive odorHighly toxic, corrosiveI[Threshold Limit Values ppm: 0.05; Permissible Exposure Limit ppm: 0.05; Lethal Concentration ppm: 50; Immediately Dangerous to Life or Health ppm: 2]SilaneSiH47803-62-5Compressed gasSilaneColorless, sharp repulsive odorPyrophoricI[Threshold Limit Values ppm: 5; Permissible Exposure Limit ppm: 5]Silicon tetrachlorideSiCl410026–04–7LiquidCompressed gasColorless fuming liquid, irritating odorToxic, corrosiveII[Threshold Limit Values ppm: 2; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 750; Immediately Dangerous to Life or Health ppm: 100]Silicon tetrafluorideSiF4(HF)7783–61–1Compressed gasCompressed gasColorless, strong irritating disagreeable odorToxic, corrosiveII[Threshold Limit Values ppm: 3.2; Permissible Exposure Limit ppm: 3.2; Lethal Concentration ppm: 922; Immediately Dangerous to Life or Health ppm: 30]StibineSbH37803–52–3Compressed gasStibineColorless, odor like rotten eggsHighly toxic, flammableI[Threshold Limit Values ppm: 0.1; Permissible Exposure Limit ppm: 0.1; Lethal Concentration ppm: 178; Immediately Dangerous to Life or Health ppm: 5]Sulfur dioxideSO27446–09–5Liquefied gasCompressed gasColorless, pungent odorToxic, corrosiveIII[Threshold Limit Values ppm: 2; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 2520; Immediately Dangerous to Life or Health ppm: 100]Sulfur hexafluorideSF62551-62-4Liquefied gasCompressed gascolorless, odorless, tastelessSimple asphyxiantIV—Sulfuryl fluorideSO2F22699–79–8Liquefied gasCompressed gasColorless, odorless, strong irritatingToxic, corrosiveIII[Threshold Limit Values ppm: 5; Permissible Exposure Limit ppm: 5; Lethal Concentration ppm: 3020; Immediately Dangerous to Life or Health ppm: 1000]Tellurium hexafluorideTeF67783–80–4Compressed gasTellurium hexafluorideColorless gas, repulsive odor, strong irritatingHighly toxic, corrosiveI[Threshold Limit Values ppm: 0.02; Permissible Exposure Limit ppm: 0.02; Lethal Concentration ppm: 25; Immediately Dangerous to Life or Health ppm: 1]Titanium tetrachlorideTiCl47550–45–0LiquidTitanium tetrachlorideColorless, yellow or reddish brownHighly toxic, corrosiveI[Permissible Exposure Limit ppm: 1.3; Lethal Concentration ppm: 119; Immediately Dangerous to Life or Health ppm: 1.3]Tungsten hexafluorideWF6(HF)7783–82–6Compressed gasCompressed gasColorless, strong irritatingToxic, corrosiveII[Permissible Exposure Limit ppm: 30; Lethal Concentration ppm: 218; Immediately Dangerous to Life or Health ppm: 30]Vinyl bromideC2H3Br593-60-2Liquefied gasCompressed gasColorless, sweet odorToxic, flammableIV[Permissible Exposure Limit ppm: .01; Lethal Concentration ppm: >40,000]Vinyl chlorideC2H3Cl75-01-4Liquefied gasCompressed gasColorless, sweet odorToxic, flammableIV[Lethal Concentration ppm: 150.000]XenonXe7440-63-3Compressed gasCompressed gasColorless, odorless, tastelessSimple asphyxiantIV—