# NIOSH Pocket Guide to Chemical Hazards
Propane | CAS 74-98-6
CH3CH2CH3 | RTECS TX2275000
Synonyms & Trade Names Bottled gas, Dimethyl methane, n-Propane, Propyl hydride | DOT ID & Guide 1075 115 1978 115
Exposure Limits | NIOSH REL: TWA 1000 ppm (1800 mg/m3)
OSHA PEL: TWA 1000 ppm (1800 mg/m3)
IDLH 2100 ppm [10%LEL] | Conversion 1 ppm = 1.80 mg/m3
Physical Description Colorless, odorless gas. [Note: A foul-smelling odorant is often added when used for fuel purposes. Shipped as a liquefied compressed gas.]
MW: 44.1 | BP: -44°F | FRZ: -306°F | Sol: 0.01%
VP(70°F): 8.4 atm | IP: 11.07 eV | RGasD: 1.55 |
Fl.P: NA (Gas) | UEL: 9.5% | LEL: 2.1% |
Flammable Gas
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH S87 (II-2)
Personal Protection & Sanitation Skin: Frostbite Eyes: Frostbite Wash skin: No recommendation Remove: When wet (flammable) Change: No recommendation Provide: Frostbite | First Aid (See procedures) Eye: Frostbite Skin: Frostbite Breathing: Respiratory support
Respirator Recommendations NIOSH/OSHA Up to 2100 ppm: (APF = 10) Any supplied-air respirator/(APF = 50) Any self-contained breathing apparatus with a full facepiece Emergency or planned entry into unknown concentrations or IDLH conditions: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin and/or eye contact (liquid)
Symptoms Dizziness, confusion, excitation, asphyxia; liquid: frostbite
Target Organs central nervous system
See also: INTRODUCTION