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Propane. Propane is flammable, noncorrosive, colorless and nontoxic. It also liquefies easily und pressure at atmospheric temperature and is one of the lightest hydrocarbons in liquid phases in the paraffin series. While propane is nontoxic, prolonged inhalation of high concentrations has an anesthetic effect.
1993-1994 ACGIH TLV: Simple asphyxiant. Description of substance: Colorless, odorless gas. LEL: . . 2.1% (10% LEL, 2,100 ppm). Original (SCP) IDLH: 20,000 ppm [LEL]. Basis for original (SCP) IDLH: Propane is a simple asphyxiant and does not present an IDLH hazard at concentrations below its lower explosive limit (LEL).The chosen IDLH is based on the LEL of 21,000 ppm rounded down to 20,000 ppm.993-1994 ACGIH TLV: Simple asphyxiant. Description of substance: Colorless, odorless gas. LEL: . . 2.1% (10% LEL, 2,100 ppm). Original (SCP) IDLH: 20,000 ppm [LEL]. Basis for original (SCP) IDLH: Propane is a simple asphyxiant and does not present an IDLH hazard at concentrations below its lower explosive limit (LEL).