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| Pyridine | CAS 110-86-1 | ||
| C5H5N | RTECS UR8400000 | ||
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Synonyms & Trade Names Azabenzene, Azine |
DOT ID & Guide 1282 129 |
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Exposure Limits |
NIOSH REL: TWA 5 ppm (15 mg/m3) | ||
| OSHA PEL: TWA 5 ppm (15 mg/m3) | |||
| IDLH 1000 ppm | Conversion 1 ppm = 3.24 mg/m3 | ||
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Physical Description Colorless to yellow liquid with a nauseating, fish-like odor. |
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MW: 79.1 |
BP: 240°F |
FRZ: -44°F |
Sol: Miscible |
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VP: 16 mmHg |
IP: 9.27 eV |
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Sp.Gr: 0.98 |
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Fl.P: 68°F |
UEL: 12.4% |
LEL: 1.8% |
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| Class IB Flammable Liquid: Fl.P. below 73�F and BP at or above 100�F. | |||
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Incompatibilities & Reactivities Strong oxidizers, strong acids |
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Measurement Methods NIOSH 1613; OSHA 7 |
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Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation Provide: Eyewash, Quick drench |
First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator Recommendations
NIOSH/OSHA Up to 125 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode�/(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)� Up to 50 ppm: (APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)/(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)�/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 1000 ppm: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode 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 |
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| Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact | |
| Symptoms Irritation eyes; headache, anxiety, dizziness, insomnia; nausea, anorexia; dermatitis; liver, kidney damage | |
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Target Organs
Eyes, skin, central nervous system, liver, kidneys, gastrointestinal tract, |
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| See also: INTRODUCTION |