# NIOSH Pocket Guide to Chemical Hazards
Strychnine | CAS 57-24-9
C21H22N2O2 | RTECS WL2275000
Synonyms & Trade Names Nux vomica, Strynchnos | DOT ID & Guide 1692 151
Exposure Limits | NIOSH REL: TWA 0.15 mg/m3
OSHA PEL: TWA 0.15 mg/m3
IDLH 3 mg/m3 | Conversion
Physical Description Colorless to white, odorless, crystalline solid. [pesticide]
MW: 334.4 | BP: Decomposes | MLT: 514°F | Sol: 0.02%
VP: Low | IP: ? |  | Sp.Gr: 1.36
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid, but difficult to ignite.
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH 5016
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: No recommendation Wash skin: When contaminated Remove: No recommendation Change: Daily | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash promptly Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 0.75 mg/m3: (APF = 5) Any dust and mist respirator Up to 1.5 mg/m3: (APF = 10) Any dust and mist respirator except single-use and quarter-mask respirators/(APF = 10) Any supplied-air respirator Up to 3 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode/(APF = 25) Any powered, air-purifying respirator with a dust and mist filter/(APF = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(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 with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Stiff neck, facial muscle; restlessness, anxiety, increased acuity of perception; increased reflex excitability; cyanosis; tetanic convulsions with opisthotonos
Target Organs central nervous system
See also: INTRODUCTION