# NIOSH Pocket Guide to Chemical Hazards
Caprolactam | CAS 105-60-2
C2H11NO | RTECS CM3675000
Synonyms & Trade Names Aminocaproic lactam, epsilon-Caprolactam, Hexahydro-2H-azepin-2-one, 2-Oxohexamethyleneimine | DOT ID & Guide
Exposure Limits | NIOSH REL: Dust: TWA 1 mg/m3 ST 3 mg/m3 Vapor: TWA 0.22 ppm (1 mg/m3) ST 0.66 ppm (3 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 4.63 mg/m3
Physical Description White, crystalline solid or flakes with an unpleasant odor. [Note: Significant vapor concentrations would be expected only at elevated temperatures.]
MW: 113.2 | BP: 515°F | MLT: 156°F | Sol: 53%
VP: 0.00000008 mmHg | IP: ? |  | Sp.Gr: 1.01
Fl.P: 282°F | UEL: 8.0% | LEL: 1.4% |
Combustible Solid
Incompatibilities & Reactivities Strong oxidizers, (acetic acid + dinitrogen trioxide)
Measurement Methods OSHA PV2012
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily | First Aid (See procedures) Eye: Irrigate immediately Skin: Water wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation skin, eyes, respiratory system; epistaxis (nosebleed); dermatitis, skin sensitization; asthma; irritability, confusion, dizziness, headache; abdominal cramps, diarrhea, nausea, vomiting; liver, kidney injury
Target Organs Eyes, skin, respiratory system, central nervous system, cardiovascular system, liver, kidneys
See also: INTRODUCTION