# NIOSH Pocket Guide to Chemical Hazards
2-Aminopyridine | CAS 504-29-0
NH2C5H4N | RTECS US1575000
Synonyms & Trade Names alpha-Aminopyridine, alpha-Pyridylamine | DOT ID & Guide 2671 153
Exposure Limits | NIOSH REL: TWA 0.5 ppm (2 mg/m3)
OSHA PEL: TWA 0.5 ppm (2 mg/m3)
IDLH 5 ppm | Conversion 1 ppm = 3.85 mg/m3
Physical Description White powder, leaflets, or crystals with a characteristic odor.
MW: 94.1 | BP: 411°F | MLT: 137°F | Sol: >100%
VP(77°F): 0.8 mmHg | IP: 8.00 eV |  | Sp.Gr: ?
Fl.P: 154°F | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH S158 (II-4)
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 5 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: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, nose, throat; headache, dizziness; excitement; nausea; high blood pressure; respiratory distress; lassitude (weakness, exhaustion); convulsions; stupor
Target Organs central nervous system, respiratory system
See also: INTRODUCTION