Chemicals measured by Halocarbons and other Atmospheric Trace Gases

Short name Common name Chemical formula Chemical Structure Start date End date Type of sample Usage
N2O nitrous oxide N2O N=N+-O- or -N=N+=O 1977 present flasks, in situ fertiziler source, industrial, natural
CFC-11 trichlorofluoromethane CCl3F CCl3F 1977 present flasks, in situ refrigerant, foam blowing agent
CFC-12 dichlorodifluoromethane CCl2F2 CCl2F2 1977 present flasks, in situ refrigerant
CFC-13 chlorotrifluoromethane CClF3 CClF3 2014 present flasks refrigerant
CFC-113 1,1,2-trichloro-1,2,2-trifluoroethane C2Cl3F3 CClF2CCl2F 1992 present flasks, in situ electronics solvent
CFC-114 1,2-Dichlorotetrafluoroethane C2Cl2F4 CClF2CClF2 2014 present flasks refrigerant
CFC-115 Chloropentafluoroethane C2ClF5 CF3CClF2 2014 present flasks refrigerant
CCl4 carbon tetrachloride CCl4 CCl4 1988 present flasks, in situ CFC feedstock, solvent
CH3CCl3 methyl chloroform CH3CCl3 CH3CCl3 1990 present flasks, in situ solvent, former fire extinguishing agent
halon-1211 bromochlorodifluoromethane CBrCl2F CBrCl2F 1992 present flasks, in situ fire extinguishing agent
halon-1301 bromotrifluoromethane CBrF3 CBrF3 1995 present flasks fire extinguishing agent
halon-2402 1,2-dibromo-1,1,2,2-tetrafluoroethane C2Br2F4 CBr2FCBr2F 1995 present flasks fire extinguishing agent
HCFC-21 dichlorofluoromethane CHCl2F CHCl2F 2015 present flasks propellant and refrigerant
HCFC-22 chlorodifluoromethane CHClF2 CHClF2 1992 present flasks refrigerant
HCFC-123 2,2-dichloro-1,1,1-trifluoroethane  C2HCl2F3 CHCl2CF3 2017 present flasks low pressure refrigeration/HVAC
HCFC-124 1-chloro-1,2,2,2-tetrafluoroethane C2HClF4 CHClFCF3 2014 present flasks refrigerant, fire extinguishing agent
HCFC-133a 1,1,1-trifluoro-2-chloroethane C2H2ClF3 CH2ClCF3 2014 present flasks refrigerant, solvent, reagant in organic synthesis
HCFC-141b 1,1-dichloro-1-fluoroethane C2H3Cl2F CH3CCl2F 1993 present flasks refrigerant, fire extinguishing agent, polyurethane foam systems
HCFC-142b chloro-1,1-difluoroethane C2H3ClF2 CH3CClF2 1992 present flasks refrigerant, foam blowing agent, feedstock for PVDF
HFC-23 trifluoromethane CHF3 CHF3 2014 present flasks waste product of HCFC-22 production, limited speciality refrigeration systems.
HFC-32 difluoromethane CH2F2 CH2F2 2009 present flasks refrigerant
HFC-125 1,1,1,2,2-pentafluoroethane C2HF5 CF3CHF2 2007 present flasks refrigerant, fire extinguishing agent
HFC-134a 1,1,1,2-tetrafluoroethane CF3CH2F CF3CH2F 1994 present flasks refrigerant, fire extinguishing agent, solvent, dielectric
HFC-143a 1,1,1-trifluoroethane C2H3F3 CF3CH3 2007 present flasks refrigerant, propellant for cleaning electronic components
HFC-152a 1,1-difluoroethane C2H4F2 CH3CHF2 2000 present flasks propellant for dusters, aerosol spray
HFC-227ea 1,1,1,2,3,3,3-heptafluoropropane C3HF7 CF3CHFCF3 2011 present flasks fire extinguishing agent
HFC-236fa 1,1,1,3,3,3-hexafluoropropane C3H2F6 CF3CH2CF3 2014 present flasks fire extinguishing agent, a foaming agent, refrigerant, heat transfer medium, dielectric, sterilant, polymerization medium, a carrier fluid, a displacement drying agent, a thermodynamic power cycle working fluid 
HFC-365mfc 1,1,1,3,3-pentafluorobutane C4H5F5 CF3CH2CF2CH3 2009 present flasks a forming agent
CH3Cl methyl chloride CH3Cl CH3Cl 1993 present flasks natural, algae, former refrigerant.
CH3Br methyl bromide CH3Br CH3Br 1995 present flasks fumigant, natural, former fire extinguishing agent
CH2Cl2 dichloromethane CH2Cl2 CH2Cl2 1994 present flasks mainly industrial solvent, natural algea, wetlands, oceanic sources, volcanos
CH2Br2 dibromomethane CH2Br2 CH2Br2 2014 present flasks solvent, oceanic algae
C2Cl4 tetrachloroethene C2Cl4 C2Cl4 1995 present flasks dry cleaning, solvent
C2HCl3 trichloroethene C2HCl3 CHCl=CCl2 2015 present flasks solvent
CHCl3 chloroform CHCl3 CHCl3 1995 present flasks precusor to PTFE and refrigernats, anesthetic, anxiolytic, sedative, natural source: seaweed
C6H6 benzene C6H6 C6H6 1999 present flasks crude oil, petrochemical and coal
C2H6 ethane C2CH6 CH3CH3 2014 present flasks natural gas, refrigerant
nC4H10 n-butane C4H10 CH3CH2CH2CH3 2014 present flasks fuel gas, fragrance extraction solvent, either alone or in a mixture with propane, and as a feedstock for the manufacture of ethylene and butadiene, a key ingredient of synthetic rubber.
C2H2 acetylene C2H2 CH=CH 2014 present flasks fuel gas, feedstock
iC5H12 i-pentane C5H12 CH3CH(CH3)CH2CH3 2014 present flasks natural gas, refrigerant for dry ice and LN2
C3H8 propane C3H8 CH3CH2CH3 2014 present flasks heat source, refrigerant R-290
nC5H12 n-pentane C5H12 CH3CH2CH2CH2CH3 2014 present flasks fuel, natural gas processing and petroluem refining, refrigerant
iC4H10 i-butane C4H10 CH3CH(CH3)CH3 2014 present flasks fuel, propellant, feedstock
nC6H14 n-hexane C6H14 CH3CH2CH2CH2CH2CH3 2014 present flasks gasoline, refining crude oil
COS carbonyl sulfide COS OCS 2000 present flasks fumigant, natural, produced during CS2
SF6 sulfur hexafluoride SF6 SF6 1995 present flasks, in situ diaelectric, power distribution
SO2F2 sulfuryl fluoride SO2F2 SO2F2 2015 present flask fumigant for termites
PFC-116 hexafluoroethane C2F6 CF3CF3 2014 present flask etchant, aluminum and silicon manufacturing
PFC-218 octafluoropropane C3F8 CF3CF2CF3 2014 present flask etchant, refrigerant
CF4 carbon tetrafluoride CF4 CF4 2014 present flask etchant, aluminum and silicon manufacturing
NF3 nitrogen trifluoride NF3 NF3 2015 present flask etchant and silicon manufacturing
PFTEA pentadecafluorotriethylamine C6F15N N(C2F5)3 2017 present flask etchant and silicon manufacturing
PFTPA pentadecafluorotripropylamine C9F21N N(C3F7)3 2017 present flask etchant and silicon manufacturing
Morpholine Perfluoro-N-methylmorpholine C4H9NO O(CH2CH2)2NH 2017 present flask diaelectric, power distribution, coating for fruit
HFO-1234ze 1,3,3,3-Tetrafluoro-1-propene C3H2F4 CHF=CHCF3 2016 present flask replacement for HFC-134a
HFO-1234yf 2,3,3,3-tetrafluoropropene C3H2F4 CH2=CFCF3 2016 present flask replacement for HFC-134a
CH4 methane CH4 CH4 1996 present Airborne GCs natural gas, nature
H2 hydrogen H2 H2 1996 present Airborne GCs fuel
CO carbon monoxide CO CO 1996 present Airborne GCs product of combustion
PAN peroxyacyl nitrate C2H3NO5 C2H3NO5 2016 present Airborne GCs Major source of remote marine boundary layer ozone, natural, manmade (pollution)
CH3I methyl iodide CH3I CH3I 2009 present Airborne GCs marine source, man made (pollution)
O3 ozone O3 O3 2005 present Airborne GCs photochemical, pollution
H2O water vapor H2O H2O 2005 present Airborne GCs natural