Pyridine
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CAS
110-86-1
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C5H5N
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RTECS
UR8400000
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Synonyms & Trade Names
Azabenzene, Azine
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DOT ID & Guide
1282 / 129
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Exposure
Limits
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NIOSH REL: TWA 5 ppm (15 mg/m3)
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OSHA PEL: TWA 5 ppm (15 mg/m3)
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IDLH
1000 ppm
See: 110861
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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
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BP: 240°F
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FRZ: -44°F
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Sol: Miscible
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VP: 16 mmHg
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IP: 9.27 eV
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Sp.Gr: 0.98
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Fl.P: 68°F
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UEL: 12.4%
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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
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash, Quick drench
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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
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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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
See ICSC CARD: 0323 See MEDICAL TESTS: 0200
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