n-Pentane |
Synonyms & Trade Names Pentane, normal-Pentane |
CAS No. 109-66-0 |
RTECS No. RZ9450000 |
DOT ID & Guide 1265 128 |
FormulaCH3[CH2]3CH3 |
Conversion 1 ppm = 2.95 mg/m3 |
IDLH 1500 ppm [10%LEL]
See: 109660 |
Exposure Limits NIOSH REL: TWA 120 ppm (350 mg/m3) C 610 ppm (1800 mg/m3) [15-minute]
OSHA PEL†: TWA 1000 ppm (2950 mg/m3) |
Measurement Methods
NIOSH 1500;
OSHA 7
See: NMAM or OSHA Methods |
Physical Description Colorless liquid with a gasoline-like odor. [Note: A gas above 97°F. May be utilized as a fuel.] |
MW: 72.2 |
BP: 97°F |
FRZ: -202°F |
Sol: 0.04% |
VP: 420 mmHg |
IP: 10.34 eV |
Sp.Gr: 0.63 |
Fl.P: -57°F |
UEL: 7.8% |
LEL: 1.5% |
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| Class IA Flammable Liquid: Fl.P. below 73°F and BP below 100°F. |
Incompatibilities & Reactivities Strong oxidizers |
Exposure Routes inhalation, ingestion, skin and/or eye contact |
Symptoms irritation eyes, skin, nose; dermatitis; chemical pneumonitis (aspiration liquid); drowsiness; in animals: narcosis |
Target Organs Eyes, skin, respiratory system, central nervous system |
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Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations NIOSH Up to 1200 ppm:
(APF = 10) Any supplied-air respirator Up to 1500 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator 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:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0534
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