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Specialty Gases Reference Guide

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Technical Data Abbreviations and Symbols Symbol Definition A Å AA abs Angstrom(s) Atomic Absorption absolute ACGIH American Conference of Governmental Industrial Hygienists ASTM American Society for Testing Materials atmosphere(s) average atm avg B Bar bar bp Btu C CAA Clean Air Act cal calorie(s) CAS Chemical Abstract Services ccm cubic centimeter(s) per minute ccs cubic centimeter(s) per second CEM Continuous Emission Monitor cf cubic feet H 14 CFCs Chlorofluorocarbons CFR Code of Federal Regulations CGA Compressed Gas Association cm centimeter(s) cm2 cm3 square centimeter , cc cubic centimeter COA Certificate of Analysis COC Certificate of Conformance CP Cp Chemically Pure specific heat at constant pressure Cv Cv °C specific heat at constant volume coefficient of flow degree(s) Celsius G g gal gram(s) gallon(s) GC Gas Chromatography or Chromatograph GMIS Gas Manufacturers Intermediate Standard GMP Good Manufacturing Practice(s) GPA Gas Processors Association H Hall Electrolytic Conductivity Detector HAP Hazardous Air Pollutants HID hr Hz Helium Ionization Detector hour hertz M µ m3 micron(s), 10–6 cubic meter(s) mA milliampere max mg min ml maximum milligram(s) minute(s) milliliter(s) mm millimeter(s) MNPT Male National Pipe Thread mol.wt. molecular weight MOS Metal Oxide Semiconductor MPT Male Pipe Thread mp melting point MS Mass Spectrometry MSDS Material Safety Data Sheet MTBE Methyl Tertiary Butyl Ether MVCR Male VCR MVFS Male Vacuum Face Seal MW molecular weight m Bureau of Automotive Repair Unit of pressure equal to 100,000 pascals boiling point British thermal unit(s) F FID Flame Ionization Detector FNPT Female National Pipe Thread F.O.B. FPD FPT ft Freight on Board Flame Photometric Detector Female Pipe Thread foot, feet ft3 , cu ft cubic foot (feet) FTIR Fourier Transform Infrared Spectrometer or Spectroscopy FIFRA Federal Insecticide, Fungicide, and Rodenticide Act degree(s) Fahrenheit °F L L lb LC LEL liter(s) pound(s) Liquid Chromatography Lower Explosive Limit Lpm liters per minute K K kg kPa °K Kelvin kilogram(s) Kilopascal(s) degree(s) Kelvin Symbol Definition D DID DIN DISS Discharge Ionization Detector Deutsche Industrie Normen (German Industrial Standards) Diameter Index Safety System DOT Department of Transportation E ea each ECD Electron Capture Detector EPA Environmental Protection Agency J J Symbol Definition I ICP ID IDLH in in3 ISO Inductively Coupled Plasma (Spectroscopy) identification or inside diameter Immediately Dangerous to Life or Health inch , cu in cubic inch(es) International Organization for Standardization joule 1-877-PRAXAIR www.praxair.com/specialtygases

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