# NIOSH Pocket Guide to Chemical Hazards
Ethylene thiourea | CAS 96-45-7
C3H6N2S | RTECS NI9625000
Synonyms & Trade Names 1,3-Ethylene-2-thiourea; N,N-Ethylenethiourea; ETU; 2-Imidazolidine-2-thione | DOT ID & Guide
Exposure Limits | NIOSH REL: Ca Use encapsulated form. See Appendix A
OSHA PEL: none
IDLH Ca [N.D.] | Conversion
Physical Description White to pale-green, crystalline solid with a faint, amine odor. [Note: Used as an accelerator in the curing of polychloroprene & other elastomers.]
MW: 102.2 | BP: 446-595°F | MLT: 392°F | Sol(86°F): 2%
VP: 16 mmHg | IP: 8.15 eV |  | Sp.Gr: ?
Fl.P: 486°F | UEL: ? | LEL: ? |
Combustible Solid
Incompatibilities & Reactivities Acrolein
Measurement Methods NIOSH 5011; OSHA 95
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated/Daily Remove: When wet or contaminated Change: Daily | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (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, ingestion, skin and/or eye contact
Symptoms Irritation eyes; in animals: thickening of the skin; goiter; teratogenic effects; [potential occupational carcinogen]
Target Organs Eyes, skin, thyroid, reproductive system Cancer Site [in animals: liver, thyroid & lymphatic system tumors]
See also: INTRODUCTION