# NIOSH Pocket Guide to Chemical Hazards
Cyanogen chloride | CAS 506-77-4
ClCN | RTECS GT2275000
Synonyms & Trade Names Chlorcyan, Chlorine cyanide, Chlorocyanide, Chlorocyanogen | DOT ID & Guide 1589 125 (inhibited)
Exposure Limits | NIOSH REL: C 0.3 ppm (0.6 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 2.52 mg/m3
Physical Description Colorless gas or liquid (below 55°F) with an irritating odor. [Note: Shipped as a liquefied gas. A solid below 20°F. Forms cyanide in the body.]
MW: 61.5 | BP: 55°F | FRZ: 20°F | Sol: 7%
VP: 1010 mmHg | IP: 12.49 eV | RGasD: 2.16 | Sp.Gr: 1.22 (Liquid at 32°F)
Fl.P: NA | UEL: NA | LEL: NA |
Nonflammable Gas
Incompatibilities & Reactivities Water, acids, alkalis, ammonia, alcohols [Note: Can react very slowly with water to form hydrogen cyanide. May be stabilized to prevent polymerization.]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact (liquid) Eyes: Prevent eye contact (liquid) Wash skin: When contaminated (liquid) Remove: When wet or contaminated (liquid) Change: No recommendation Provide: Eyewash (liquid), Quick drench (liquid) | First Aid (See procedures) Eye: Irrigate immediately Skin: Water wash immediately (liquid) Breathing: Respiratory support Swallow: Medical attention immediately (liquid)
Respirator Recommendations To be added later
Exposure Routes inhalation, skin absorption (liquid), ingestion (liquid), skin and/or eye contact (liquid)
Symptoms Irritation eyes, upper respiratory system; cough, delayed pulmonary edema; lassitude (weakness, exhaustion), headache, dizziness, confusion, nausea, vomiting; irregular heartbeat; irritation skin (liquid)
Target Organs Eyes, skin, respiratory system, central nervous system, cardiovascular system
See also: INTRODUCTION