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Ethylene thiourea

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Synonyms & Trade Names
1,3-Ethylene-2-thiourea, N,N-Ethylenethiourea, ETU, 2-Imidazolidine-2-thione
CAS No.
96-45-7
RTECS No.
NI9625000
DOT ID & Guide
Formula
C₃H₆N₂S
Conversion
IDLH
Ca [N.D.]
See: IDLH INDEX
Exposure Limits
NIOSH REL
Ca Use encapsulated form. See Appendix A
OSHA PEL
none
Measurement Methods
NIOSH 5011;
OSHA 95
See: NMAM or OSHA Methods
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.]
Molecular Weight
102.2
Boiling Point
446-595°F
Melting Point
392°F
Solubility
(86°F): 2%
Vapor Pressure
16 mmHg
Ionization Potential
8.15 eV
Specific Gravity
?
Flash Point
486°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Combustible Solid
Incompatibilities & Reactivities
Acrolein
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 sys tumors]
Personal Protection/Sanitation
(See protection codes)
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 an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1148
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health